Food Safety in Developing Countries: Challenges, Innovations, and Policy Solutions provides a comprehensive and interdisciplinary examination of one of the most pressing public health issues of the twenty-first century. The book explores the complex and uneven burden of foodborne diseases across low- and middle-income countries, where structural inequalities, limited infrastructure, and fragmented regulatory systems contribute to persistent exposure to biological, chemical, and physical hazards. Drawing on global epidemiological evidence, it highlights that hundreds of millions of people—particularly children under five—are disproportionately affected by preventable foodborne illnesses, resulting in significant morbidity, mortality, and long-term developmental consequences.
The volume systematically analyzes key contamination pathways, including microbial pathogens such as Salmonella, Campylobacter, and pathogenic Escherichia coli, as well as chemical hazards like mycotoxins, pesticide residues, and heavy metals. It emphasizes the critical role of environmental conditions, agricultural practices, and informal food systems in shaping food safety outcomes. Particular attention is given to the informal food sector, which dominates food distribution in many developing regions and presents both significant risks and opportunities for scalable intervention.
Beyond diagnosing challenges, the book highlights innovative and context-appropriate solutions. These include rapid diagnostic technologies, digital traceability systems, improved post-harvest handling, biocontrol strategies, and data-driven risk prediction models. The integration of Good Agricultural Practices (GAP), Hazard Analysis and Critical Control Points (HACCP), and tiered regulatory frameworks is presented as essential for strengthening food safety systems while accommodating resource constraints.
Importantly, the book advances a policy-oriented perspective, arguing that sustainable improvements in food safety require institutional transformation, multisectoral collaboration, and equity-centered approaches. It underscores the need to balance regulatory enforcement with livelihood protection, particularly for smallholder farmers and informal vendors. Furthermore, it identifies emerging threats such as climate change, urbanization, and globalized supply chains as amplifiers of food safety risks.
Preface
Food safety is one of the defining public health challenges of the twenty-first century. Across the developing world — in the rapidly growing cities of sub-Saharan Africa, the dense agricultural landscapes of South Asia, the vibrant food markets of Southeast Asia, and the smallholder communities of Latin America — hundreds of millions of people face daily exposure to foodborne hazards that cause preventable illness, disability, and death. Yet food safety too often remains on the margins of national health agendas, overshadowed by communicable disease priorities that are more visible, more easily quantified, and more politically salient.
This reference book was conceived to address that gap. It draws together the best available science, policy experience, and practical innovation to provide a comprehensive, authoritative, and accessible resource for everyone who cares about safe food in developing countries: the public health officer investigating an outbreak of foodborne illness; the agricultural extension worker training smallholder farmers in post-harvest handling; the food safety regulator drafting a national food safety strategy; the graduate student conducting research on mycotoxin contamination; and the policymaker allocating limited resources across competing health priorities.
The book is organized around three interconnected themes, reflected in its subtitle. First, Challenges — understanding the scale, nature, and structural determinants of food safety problems in developing countries is the necessary foundation for effective action. Without a clear-eyed assessment of what is going wrong and why, efforts at improvement are inevitably misdirected. Second, Innovations — the past two decades have seen remarkable advances in food safety science and technology, from rapid diagnostic tools to blockchain-based traceability systems, from biocontrol of mycotoxins to predictive analytics for outbreak detection. Many of these innovations hold particular promise for developing country contexts, where laboratory infrastructure is limited, supply chains are complex, and institutional capacity is constrained. Third, Policy Solutions — ultimately, sustainable food safety improvement requires not just technical fixes but institutional transformation: regulatory systems that are functional, equitable, and science-based; surveillance systems that detect and respond to foodborne disease; and policy processes that engage all stakeholders, including the smallholder farmers and informal food vendors who are often the invisible backbone of developing country food systems.
Throughout the book, the emphasis is on context. Food safety challenges in sub-Saharan Africa differ in important ways from those in South Asia, Southeast Asia, or Latin America. A regulatory approach that works in Thailand may be poorly suited to conditions in Uganda. A technology developed for large-scale food processing may be inaccessible to the artisanal processor in a West African market town. This book therefore seeks to offer not a single blueprint but a toolkit of principles, evidence, and examples from which practitioners and policymakers can draw in designing interventions appropriate to their own contexts.
The book also takes seriously the equity dimensions of food safety. In developing countries, the people most exposed to foodborne hazards are often the poorest and most marginalized: subsistence farmers who cannot afford improved storage; consumers who rely on informal street food because they have no alternative; women food vendors who lack access to clean water and hygienic facilities. Food safety policy that imposes costs without providing support, or that improves the safety of premium export products while ignoring the food consumed by poor domestic consumers, is both technically incomplete and morally inadequate.
The editorial team expresses its deep gratitude to the researchers, practitioners, and policymakers from across the developing world whose work forms the evidential foundation of this volume. Their dedication — often in conditions of great difficulty and with severely limited resources — is an inspiration. This book is dedicated to them, and to the millions of people whose health and livelihoods depend on the goal they have committed themselves to: a world where safe food is not a privilege of the wealthy few, but a right and reality for all.
Chapter 1: The Global Burden of Foodborne Disease
Understanding the true scale of foodborne illness is the essential starting point for any serious food safety strategy. This chapter reviews global and regional epidemiology, the most affected populations, the economic costs, and the critical data gaps that hamper effective response.
1.1 Defining Foodborne Disease
Foodborne diseases are illnesses resulting from the consumption of food or beverages contaminated with pathogenic microorganisms, their toxins, or harmful chemical or physical agents. The World Health Organization (WHO) defines foodborne disease broadly to encompass any illness of an infectious or toxic nature caused by or thought to be caused by the consumption of food or water. This definition encompasses a spectrum of conditions ranging from mild, self-limiting gastroenteritis to severe systemic illness and death.
The clinical manifestations offoodborne disease vary enormously depending on the causative agent, the dose ingested, and characteristics of the exposed individual — particularly age, nutritional status, and immune competence. The most common presentation is acute diarrheal illness, often accompanied by nausea, vomiting, and abdominal cramps. However, foodborne agents can also cause systemic infections (typhoid fever, listeriosis, brucellosis), neurological disease (botulism, neurocysticercosis, methylmercury poisoning), hepatic disease (hepatitis A, aflatoxicosis), and reproductive harm (toxoplasmosis in pregnancy).
The distinction between foodborne and waterborne illness is conceptually important but practically difficult to maintain in developing country contexts, where water is used in food preparation and irrigation, and where sanitation failures simultaneously contaminate both food and water supplies. For this reason, this book frequently refers to 'food and waterborne diseases' as an integrated category, while acknowledging the analytical utility of distinguishing the two when data permit.
It is important to distinguish foodborne illness from foodborne infection and foodborne intoxication. Foodborne infection results when the pathogen itself colonizes or invades the body following ingestion — as with Salmonella, Campylobacter, and most parasitic agents. Foodborne intoxication occurs when a preformed toxin, produced by a microorganism in the food before consumption, causes illness — as with Staphylococcus aureus enterotoxin or Clostridium botulinum neurotoxin. Some agents cause toxico-infection, in which ingested organisms produce toxin in vivo — as with Clostridium perfringens. Understanding these distinctions has important implications forfood safety control strategies.
1.2 The Global Epidemiological Picture
The first systematic global estimates of the burden of foodborne disease were published by WHO in 2015, the product of a major effort by the Foodborne Disease Burden Epidemiology Reference Group (FERG) convened in 2006. These estimates, covering 31 global foodborne hazards including bacteria, viruses, intestinal protozoa, helminths, and toxins, revealed a burden far larger than previously recognized. Approximately 600 million people — nearly one in ten of the world's population — suffer a foodborne illness each year, resulting in approximately 420,000 deaths and 33 million Disability-Adjusted Life Years (DALYs) lost.
Children under five years of age bear a disproportionate share of this burden, accounting for approximately 40 percent of total foodborne DALYs despite representing only about 9 percent of the global population. This reflects both the biological vulnerability of young children to foodborne pathogens — their immune systems are not yet fully developed, they are less able to compensate for fluid losses, and they are more susceptible to neurological and developmental sequelae — and the social vulnerability created by caregiving practices, hygiene conditions, and dietary patterns in early childhood.
Among the 31 hazards analyzed by FERG, diarrheal agents collectively account for the largest share of the global foodborne burden, with non-typhoidal Salmonella, Campylobacter jejuni, enteropathogenic and enterotoxigenic E. coli, Cryptosporidium, and norovirus among the leading contributors. Non-typhoidal Salmonella alone causes an estimated 93.8 million illnesses and 59,000 deaths globally per year. However, the relative importance of specific pathogens varies considerably by region, reflecting differences in food systems, animal husbandry practices, climate, hygiene infrastructure, and underlying population health.
Illustrations are not included in the reading sample
Table 1.1: Estimated global burden ofselected foodborne pathogens and hazards. Sources: WHO FERG (2015); IARC (2012); CGIAR (2019).
1.3 The Disproportionate Burden on Developing Countries
The global burden of foodborne disease is distributed profoundly unequally. Sub-Saharan Africa and South Asia bear the highest absolute and per-capita burdens, reflecting the intersection of high exposure (contaminated food and water, poor sanitation), high susceptibility (malnutrition, HIV, and other immune-compromising conditions), and inadequate health system capacity to prevent, detect, and respond to foodborne illness. The African region accounts for approximately 91 million foodborne illnesses and 137,000 deaths annually — the highest per-capita death rate from foodborne disease in the world. South-East Asia follows closely, with an estimated 150 million illnesses peryear.
These geographic disparities reflect structural inequalities deeply rooted in colonial history, decades of underinvestment in public health infrastructure, and the persistence of poverty. In low-income countries, the informal food sector — comprising street food vendors, wet markets, home-based processors, and small-scale retailers — provides the majority of food for the majority ofthe population, often under physical conditions that make basic food safety practices extremely difficult. Cold chain infrastructure is sparse, clean water is often unavailable at food preparation sites, and waste disposal systems are inadequate.
Malnutrition both contributes to and is exacerbated by foodborne disease. Children who experience repeated episodes of diarrheal illness — much of it foodborne or waterborne — suffer progressive damage to gut epithelial integrity (environmental enteric dysfunction), which impairs nutrient absorption and contributes to stunting even in the absence of clinically apparent diarrhea. The vicious cycle of malnutrition-infection-malnutrition means that food safety and nutrition must be addressed together, not in separate policy silos.
Key Statistic: Child Burden of Foodborne Disease
Children under five years of age account for 40% of the global foodborne disease burden, suffering approximately 220 million illnesses and 96,000 deaths from foodborne causes each year. In sub-Saharan Africa, diarrheal diseases — a significant proportion of which are foodborne — remain among the top five causes of death in children under five. Each episode of severe diarrhea increases the risk of stunting, cognitive impairment, and long-term developmental disadvantage. Preventing foodborne disease in young children is therefore not only a matter ofsurvival but of lifelong human potential.
1.4 Economic Costs of Foodborne Illness
The economic burden of foodborne disease in developing countries is enormous, encompassing direct costs (medical treatment, hospitalization, and lost productivity due to illness) and indirect costs (post-illness disability and mortality, disruption to agricultural trade, effects on tourism, and long-term cognitive and developmental consequences in affected children). The World Bank has estimated annual productivity losses from foodborne disease in low- and middle-income countries at approximately USD 95.2 billion, with direct medical costs adding a further USD 15 billion — and these figures are almost certainly underestimates given the severe underreporting offoodborne illness in most developing countries.
For households, the economic impact of a foodborne illness episode can be catastrophic in the absence of health insurance and social protection. Direct costs — consultation fees, medicines, transport to health facilities — can consume a significant fraction of a poor household's weekly income. Indirect costs in terms of days of work or schooling lost are additionally significant. In agricultural communities, illness among adults during critical planting or harvesting periods can have cascading effects on food security and household income throughout the year.
At the national and international level, food safety failures impose severe costs on agricultural trade and economic development. A single high-profile food safety incident — such as the detection of excessive pesticide residues in a vegetable export consignment, or the finding of aflatoxin contamination in a shipment of groundnuts — can result in the rejection of the entire shipment, reputational damage extending across the exporting country's agricultural sector, and loss of market access lasting months or years. For smallholder farmers and agricultural exporters in developing countries who depend on access to premium export markets, these consequences can be economically devastating.
The relationship between food safety and agricultural trade is bidirectional: poor food safety excludes developing country exports from international markets, but the pressure of international market access requirements has also been one of the most powerful drivers of food safety improvement in many developing countries. Thailand's shrimp industry, Kenya's horticultural export sector, and Chile's fresh fruit export sector have all developed strong food safety systems in response to the requirements of export markets in the European Union, United States, and Japan.
1.5 Surveillance Gaps and the Measurement Challenge
One of the most significant obstacles to effective food safety policy in developing countries is the severe underestimation of the actual burden of foodborne disease. Official surveillance systems capture only a small fraction of actual cases: most people who experience a mild episode offoodborne illness do not seek medical attention; among those who do, most are not tested to identify the causative agent; and even among those who are tested, reporting to national surveillance systems is often incomplete.
WHO estimates that the reported-to-actual case ratio for many foodborne pathogens in developing countries is in the range of 1:100 to 1:1,000 — meaning that for every case officially recorded, between 100 and 1,000 additional cases go undetected and unreported. This iceberg effect has profound implications for food safety policy: if the visible cases represent only a tiny fraction of the true burden, investments in food safety will appear to have minimal impact even when they are actually preventing large numbers of illnesses.
Strengthening foodborne disease surveillance in developing countries is therefore not merely a technical priority but a political one. Without better data on the true burden of foodborne disease, it is difficult to make the case for investment in food safety infrastructure, to hold regulatory agencies accountable for results, or to track progress over time. Sentinel surveillance networks, community-based burden studies, and the application of multiplier methods to estimate the full iceberg from reported cases all offer pathways toward better data, but require sustained investment in health system capacity and laboratory infrastructure.
Chapter 2: Key Hazards and Contamination Pathways
Food safety hazards span a vast range of biological, chemical, and physical agents. This chapter provides a systematic overview of the major hazard categories and the specific pathways through which they enterand move through food supply chains in developing country contexts.
2.1 Biological Hazards
2.1.1 Bacterial Pathogens
Bacteria represent the most diverse and arguably the most important category of foodborne pathogens globally. In developing countries, the most clinically significant bacterial foodborne pathogens include Salmonella enterica (particularly non-typhoidal serovars and the typhoidal serovars Typhi and Paratyphi), Campylobacter jejuni and C. coli, Vibrio cholerae, Shigella sonnei and S. flexneri, Listeria monocytogenes, Staphylococcus aureus, Bacillus cereus, Clostridium botulinum, Clostridium perfringens, and multiple pathogenic variants of Escherichia coli including enterotoxigenic (ETEC), enteropathogenic (EPEC), enterohemorrhagic (EHEC), enteroaggregative (EAEC), and enteroinvasive (EIEC) strains.
Salmonella is a zoonotic pathogen with an extraordinarily wide host range, persisting in the gastrointestinal tracts of poultry, swine, cattle, reptiles, and many other animals. It enters the human food supply through multiple routes: improperly handled or undercooked poultry products and eggs represent the most important vehicles globally, but contamination of fresh produce irrigated with animal manure-contaminated water, and cross-contamination during food processing and preparation, are also major pathways. In developing countries, the conditions of live animal markets and backyard slaughter — common in many settings — create particular risks for Salmonella transmission.
Campylobacter is the leading bacterial cause of acute diarrheal illness globally and is closely associated with poultry production. It is thermophilic, surviving best at 42°C (the body temperature of poultry), and is highly sensitive to drying and heating — properties that make it primarily a problem of undercooked or cross-contaminated poultry and raw milk. Despite its global prevalence, Campylobacter is frequently underdiagnosed in developing countries because microbiological investigation of diarrheal illness is uncommon, and because Campylobacter requires specialized culture conditions not routinely available in resource-limited laboratories.
Vibrio cholerae serotype 01 (and 0139) remains a significant cause of epidemic diarrheal disease in many developing countries, particularly in sub-Saharan Africa, South Asia, and Haiti. While primarily waterborne, food transmission plays an important role, particularly through street foods prepared with contaminated water and through consumption of raw or undercooked seafood from contaminated coastal waters. Cholera outbreaks in humanitarian emergency settings — refugee camps, post-disaster populations — represent some of the most extreme expressions of the consequences of food and water safety failure.
Enterohemorrhagic Escherichia coli (EHEC), particularly the O157:H7 serotype, is a relatively recently recognized foodborne pathogen responsible for severe hemorrhagic colitis and the potentially fatal hemolytic uremic syndrome (HUS). While primarily associated with beef in developed countries, EHEC infection has been documented in developing countries in association with a range of vehicles including street foods, fresh vegetables, and untreated water. Its infectious dose is extremely low — as few as 10 to 100 organisms — making environmental contamination a significant transmission pathway.
2.1.2 Viral Pathogens
Foodborne viral pathogens cause an enormous global burden of acute gastroenteritis and, in the case of hepatitis A virus (HAV) and hepatitis E virus (HEV), acute liver disease. Norovirus is the leading cause of acute gastroenteritis globally, responsible for an estimated 125 million foodborne illnesses annually. It infects through the fecal-oral route, persists in the environment for extended periods, and requires an extremely low infectious dose (fewer than 18 viral particles). Fresh produce, shellfish filter-fed in contaminated waters, and ready-to-eat foods handled by infected food workers are the most important food vehicles.
Hepatitis A virus is endemic in many developing countries, where the majority of children are infected in early childhood and develop lifelong immunity with minimal clinical illness. As sanitation improves and population immunity declines, paradoxically, the risk of clinically significant hepatitis A outbreaks among older children and adults increases, as seen in several countries undergoing epidemiological transition. Contaminated produce, shellfish, and water are the primary vehicles. Hepatitis E virus, while primarily waterborne, can also be transmitted through food — particularly pork and game meat in some settings.
Rotavirus, though primarily transmitted person-to-person, is also a significant contributor to foodborne diarrheal disease in settings where contamination of weaning foods is common. In developing countries, it remains one of the leading causes of severe diarrheal dehydration and death in children under five, despite the availability of safe and effective vaccines. Improved food safety practices — particularly in the preparation of complementary foods for infants — can complement vaccination in reducing rotavirus burden.
2.1.3 Parasitic Foodborne Hazards
Foodborne parasites impose a substantial but frequently neglected burden in developing countries. The most epidemiologically significant include Taenia solium (pork tapeworm), Echinococcus granulosus (hydatid disease), Toxoplasma gondii, Cryptosporidium parvum, Giardia lamblia, Entamoeba histolytica, Cyclospora cayetanensis, and multiple tissue helminth parasites including Trichinella, Opisthorchis, Clonorchis, and Fasciola species.
Taenia solium deserves special emphasis as a major public health problem in many developing regions. The adult tapeworm infects humans through consumption of inadequately cooked pork containing viable cysticerci (larval cysts). Human cysticercosis — infection with the larval stage — occurs when humans inadvertently ingest T. solium eggs from fecally contaminated food, water, or hands. When larvae invade the central nervous system (neurocysticercosis), the consequences are severe: neurocysticercosis is the leading cause of acquired epilepsy in many developing countries and is associated with cognitive impairment, psychiatric disturbance, and death. Control of T. solium requires a One Health approach integrating human treatment, pig vaccination and treatment, improved sanitation, and meat inspection.
Toxoplasma gondii infects approximately one-third of the world's human population and is a leading cause of severe congenital infection and opportunistic disease in immunocompromised individuals. Primary transmission routes include consumption of undercooked meat (particularly pork, lamb, and game) and oocyst-contaminated raw vegetables and water. In settings where cats are common household animals and sanitation is poor, environmental contamination with T. gondii oocysts is pervasive, and fresh produce contamination is a significant transmission pathway.
Foodborne trematodes — Opisthorchis viverrini, Clonorchis sinensis, and related liver flukes — are major causes of hepatobiliary disease in East and Southeast Asia, where consumption of raw or insufficiently cooked freshwater fish is culturally embedded. Chronic infection with these parasites is a recognized risk factor for cholangiocarcinoma (bile duct cancer), accounting for a significant fraction of liver cancer burden in some countries. Integrated control combining health education, food safety promotion, veterinary public health, and case management is needed.
2.2 Chemical Hazards
2.2.1 Mycotoxins
Mycotoxins — toxic secondary metabolites produced by filamentous fungi — are among the most economically and medically significant food safety hazards in developing countries. They contaminate a wide range of staple crops, including maize, wheat, rice, sorghum, groundnuts, tree nuts, dried fruits, spices, and coffee. The major mycotoxin groups of concern are aflatoxins (produced by Aspergillus flavus and A. parasiticus), fumonisins (Fusarium moniliforme and F. proliferatum), deoxynivalenol and other trichothecenes (F. graminearum and related species), zearalenone (F. graminearum), ochratoxin A (A. ochraceus and Penicillium verrucosum), and patulin (P. expansum and related species).
Aflatoxins represent the most extensively studied and arguably the most consequential mycotoxin hazard in developing countries. Aflatoxin B1, the most toxic and most common naturally occurring form, is a potent hepatotoxin and the most potent naturally occurring carcinogen known. Chronic dietary exposure to aflatoxin is a well-established risk factor for hepatocellular carcinoma (liver cancer), with a synergistic interaction with chronic hepatitis B infection that dramatically amplifies risk. Population-based studies in sub-Saharan Africa and China have provided compelling evidence for the role of aflatoxin in the etiology of liver cancer in these regions.
Beyond carcinogenicity, aflatoxin exposure at dietary levels commonly encountered in developing countries has been associated with immunosuppression (increasing susceptibility to infectious diseases including malaria and tuberculosis), growth faltering in young children, reduced vaccine efficacy, and impaired cognitive development. These non-cancer effects of chronic low-level aflatoxin exposure may collectively account for a public health burden comparable to or exceeding that of cancer, but they are far less well quantified.
The Aflatoxin Emergency in Sub-Saharan Africa
Studies conducted in Kenya, Tanzania, Uganda, Ghana, Benin, and Senegal have repeatedly documented aflatoxin contamination of maize and groundnut products at levels 10 to 100 times higher than the international food safety standard of 10 ppb set for human consumption. In the 2004 outbreak of acute aflatoxicosis in Kenya — one of the worst recorded — 125 people died after consuming maize with aflatoxin levels exceeding 4,000 ppb, more than 400 times the safe limit. While acute outbreaks attract attention, the chronic burden of sub-clinical aflatoxin exposure affecting millions of people across the region may ultimately prove far more significant from a public health perspective.
2.2.2 Pesticide Residues
The global increase in pesticide use in agriculture over the past half-century has been accompanied by a parallel increase in human dietary exposure to pesticide residues. In developing countries, pesticide misuse — applying banned or restricted pesticides available on informal markets, exceeding recommended doses, failing to observe required pre-harvest intervals, using inappropriate application equipment — is widespread and results in residue levels on food products that frequently exceed international maximum residue limits (MRLs).
The consequences of pesticide residue exposure include acute toxicity (following high-dose exposure) and chronic health effects from low-level long-term exposure, including endocrine disruption, neurodevelopmental toxicity, reproductive harm, and carcinogenicity. Children are particularly vulnerable to the neurotoxic and endocrine-disrupting effects of pesticides, and the developmental window of early childhood may represent a period of heightened susceptibility.
Monitoring of pesticide residues in food products in developing countries is often inadequate, limiting the ability of regulatory agencies to detect and respond to violations. Strengthening pesticide registration systems (to prevent the sale of banned substances), improving extension services to promote safe pesticide use among farmers, and investing in residue monitoring laboratories are all essential components ofan effective pesticide management strategy.
2.2.3 Heavy Metals
Heavy metal contamination of food — particularly lead, cadmium, arsenic, and mercury — is an emerging public health concern in many developing countries. Sources include natural geological deposits, industrial pollution (mining, smelting, battery recycling), agricultural inputs (phosphate fertilizers contaminated with cadmium), and artisanal activities (gold processing using mercury). The health consequences of heavy metal exposure include neurotoxicity (particularly severe for lead and mercury in children), nephrotoxicity (cadmium), carcinogenicity (arsenic, cadmium), and cardiovasculardisease.
In South and Southeast Asia, the problem of arsenic in groundwater used for irrigating rice paddies has created a major food safety challenge: rice cultivated with arsenic-contaminated water accumulates inorganic arsenic in the grain, and because rice is the dietary staple for over half the world's population, even moderate contamination levels translate into significant population exposure. Regulatory agencies in Bangladesh, India, China, and several European countries have responded by setting MRLs for arsenic in rice and rice products, but enforcement and monitoring remain challenging.
2.2.4 Food Adulteration and Fraud
Food adulteration — the deliberate addition of inferior, non-approved, or harmful substances to food products to reduce cost, increase volume, enhance appearance, or deceive consumers — is a major food safety issue in many developing countries. Common forms include adulteration of milk with water, starch, urea, or detergents; adulteration of spices with chalk powder, ground brick, and synthetic dyes; adulteration of honey with high-fructose corn syrup; adulteration of cooking oils with non-food-grade oils; and the use of unauthorized colorants, preservatives, and flavor enhancers in processed foods.
The health consequences of food adulteration range from mild (reduced nutritional value) to severe (toxic adulterants causing acute illness or death). The 2008 Chinese melamine milk scandal — in which industrial melamine was added to infant formula and dairy products to artificially inflate apparent protein content, resulting in kidney failure and death in infants — is perhaps the most notorious recent example, but it is one of many. In India, surveys repeatedly find adulteration in a majority of sampled milk, spice, and edible oil products. Adulteration is both a food safety issue and a matter of consumer fraud, requiring both food safety regulatory responses and strong consumer protection enforcement.
2.3 Physical Hazards and Emerging Concerns
Physical hazards — foreign objects that can cause injury or choking when ingested — include glass fragments, metal shards, stones, bone fragments, wood splinters, plastic pieces, and insects. In developing countries, physical contamination is particularly associated with artisanal food processing (where mechanical separators and metal detectors are absent), the intentional adulteration of commodity foods such as grains and spices with stones to increase apparent weight, and the use of recycled, non-food-grade materials as food packaging.
Microplastic contamination of food and water has emerged as a new concern in recent years, with studies documenting the presence of microplastic particles in bottled water, seafood, sea salt, honey, beer, and many other food items. While the health significance of microplastic ingestion at currently measured levels is uncertain, the rapidly growing body of evidence on the pervasiveness of microplastic contamination suggests this will be an increasingly important food safety issue in the coming decades, including in developing countries where plastic waste management is often poor.
Chapter 3: Structural Challenges in Developing Country Food Systems
The food safety problems of developing countries cannot be understood apart from the structural features of the societies in which they occur. Poverty, infrastructure deficits, institutional weaknesses, climate change, and the dynamics of rapid urbanization all shape the food safety landscape in fundamental ways. This chapter examines these structural determinants and their interactions.
3.1 Infrastructure Deficits
Safe food requires safe infrastructure. The cold chain — the network of refrigerated storage, transport, and retail facilities that maintains temperature-sensitive foods at safe temperatures throughout the supply chain — is perhaps the most critical food safety infrastructure, and its absence in large parts of the developing world is one of the most important drivers of postharvest food safety failure. In sub-Saharan Africa, it is estimated that fewer than 25 percent of perishable agricultural products that require cold storage have access to it. Post-harvest losses of fruits and vegetables average 30 to 50 percent across the region, reflecting both microbial spoilage and pathogen growth facilitated by temperature abuse.
Reliable electricity supply is a prerequisite for cold chain infrastructure, and electricity access remains limited in many developing country rural areas and informal urban settlements. Even where grid electricity is technically available, frequent power outages render refrigeration unreliable and can actually accelerate spoilage by creating cycles of temperature fluctuation. Innovative solutions — solar-powered cold storage units, evaporative cooling technologies, hermetic storage systems — are addressing some of these infrastructure gaps, but their deployment at scale remains a challenge.
Water supply and sanitation infrastructure deficiencies are equally fundamental. Food safety requires clean water at every stage of the food chain: for irrigation, for washing produce and food contact surfaces, for cleaning equipment and facilities, and for personal hygiene by food handlers. In many developing country food processing and retailing environments, clean water is simply not available. Food handlers prepare and sell food without the ability to wash their hands or clean utensils between tasks. Open drains and inadequate sewage disposal create persistent sources ofenvironmental contamination around food markets and processing areas.
Transportation infrastructure — roads, bridges, and rural connectivity — affects food safety indirectly but significantly. Poor roads increase transportation times, leading to temperature abuse and mechanical damage to perishable products. Unpaved roads generate dust that contaminates exposed food. The inability to reach markets quickly means that perishable foods must be sold locally or held for extended periods under unsafe conditions. Investment in rural road infrastructure therefore has measurable food safety co-benefits alongside its primary economic and social development effects.
3.2 Institutional and Regulatory Weaknesses
Effective food safety systems rest on a foundation of strong institutions: clear legislative frameworks that establish standards and responsibilities; regulatory agencies with adequate mandate, resources, independence, and technical capacity; laboratory networks capable of testing food samples and biological specimens; surveillance and response systems that can detect and control foodborne disease outbreaks; and mechanisms for engaging all stakeholders in food safety governance. In many developing countries, one or more of these institutional components is absent or severely underdeveloped.
Food safety responsibilities are frequently fragmented across multiple ministries and agencies — agriculture, health, trade, industry, and environment — each with partial mandates and limited coordination mechanisms. This fragmentation creates regulatory gaps (areas of food safety risk not covered by any agency), overlaps (areas where multiple agencies have conflicting jurisdiction), and coordination failures that slow regulatory response to emerging hazards. Food importers may face multiple regulatory approvals from different agencies with inconsistent requirements. Food businesses may receive conflicting advice from different regulatory officials.
Legal frameworks for food safety in many developing countries date from colonial or early postindependence periods and are poorly adapted to the contemporary food safety challenge. They may focus on adulteration and compositional fraud rather than microbiological and chemical safety; may not incorporate modern risk-based regulatory approaches; may lack provisions for mandatory food labeling, food recall procedures, or emergency response; and may carry penalties that are too low to serve as effective deterrents. Updating food safety legislation is a priority but requires political will, technical expertise, and significant legislative capacity.
Corruption presents a particularly insidious challenge to food safety regulation in many developing countries. Underpaid inspectors may accept payments to issue certificates for non- compliant products; political connections may shield food businesses from regulatory sanction; and 'ghost inspection' — the issuance of inspection reports for facilities that were never actually visited — is not uncommon in some settings. Addressing corruption requires structural reforms — adequate inspector salaries, transparent procedures, rotation of inspection assignments, independent oversight, and whistleblower protection — as well as the broader anti-corruption environment within which food safety institutions operate.
3.3 Human Capacity Constraints
Every component of a food safety system depends ultimately on people: trained food scientists and technologists who can design and implement food safety management systems; veterinary public health professionals who understand the animal-food-human interface; epidemiologists who can investigate outbreaks and analyze trends; laboratory scientists who can identify pathogens and measure contaminants; regulatory inspectors who can assess compliance with standards; and policymakers who can design evidence-based food safety strategies. In many developing countries, all ofthese professional categories are severely undersupplied.
Universities and technical training institutions in many developing countries lack the faculty, equipment, and curriculum to produce graduates who are job-ready for food safety work. Food science and food technology programs may be heavily theoretical, with minimal laboratory practice; public health nutrition programs may address food quality but not food safety; and veterinary programs may focus on animal health rather than food safety. Building the human capital pipeline for food safety requires long-term investment in education and training at all levels, from undergraduate programs to postgraduate specialization to continuing professional development.
The 'brain drain' of trained food safety professionals from developing to developed countries is a persistent challenge, compounded by the low salaries and poor career prospects available in many public sector food safety institutions. Creative human resource management strategies — competitive public sector salaries, diaspora engagement programs, regional mobility frameworks — are needed to retain trained professionals in the countries that most need them.
3.4 Poverty, Livelihoods, and the Political Economy of Food Safety
The relationship between poverty and food safety is profound and multidimensional. Poor consumers are exposed to greater food safety risks because they rely more heavily on the informal food sector, cannot afford the premium charged for certified safe food, have less nutritional reserve to withstand food safety insults, and have less access to medical care when illness occurs. Poor food producers face higher compliance costs relative to their incomes, have less access to the capital needed to invest in food safety improvements, and are more vulnerable to the economic consequences offood safety regulation.
This political economy offood safety creates difficult trade-offs for policymakers. Enforcing food safety standards without providing support for compliance can destroy the livelihoods of poor food vendors and processors, driving them into informal channels that are even less subject to oversight. Providing support for food safety compliance without enforcement creates perverse incentives. Designing food safety policies that improve safety while protecting livelihoods and promoting equity requires careful attention to the distribution of costs and benefits and active engagement with affected communities.
The concept of proportionality in food safety regulation is relevant here: regulatory requirements should be proportionate to the actual risk posed, and should take account of the capacity of regulated entities to comply. A requirement for a HACCP plan and ISO-accredited laboratory testing may be entirely appropriate for a large food processing company but wholly inappropriate for a home-based food producer selling fermented cassava in a village market. Developing tiered regulatory systems that set different requirements for different categories of food business — based on size, risk profile, and access to resources — is an important element of equitable food safety policy.
3.5 Urbanization and Changing Food Systems
Rapid urbanization is transforming food systems across the developing world in ways that have profound food safety implications. Urban populations depend on purchased food rather than own production, and their dietary patterns are shifting toward more processed foods, more animal-source foods, and more foods consumed outside the home. These dietary transitions are accompanied by longer, more complex supply chains connecting rural producers to urban consumers — supply chains that introduce multiple points of potential contamination, require more sophisticated temperature management, and are more difficult for regulatory systems to oversee.
The proliferation of urban street food vending — one of the most visible expressions of urbanization in developing countries — creates both food safety risks and food safety opportunities. On the risk side, street food vending in dense urban environments, often without access to clean water or sanitary facilities, can facilitate rapid spread of foodborne illness among large numbers of consumers. On the opportunity side, the concentration of food vending in urban markets and streets makes targeted food safety interventions more feasible than in dispersed rural settings, and the density of consumer surveillance means that vendor reputations for safety or unsafety are quickly established.
3.6 Climate Change as a Food Safety Multiplier
Climate change is not merely an environmental concern — it is a food safety emergency in slow motion. Rising global temperatures are extending the geographic range and transmission season of many foodborne pathogens, accelerating the growth of pathogenic bacteria in food, and altering the ecology of mycotoxigenic molds in ways that increase contamination of staple crops. The frequency and intensity of extreme weather events — floods, droughts, hurricanes, heat waves — is increasing, and each ofthese events has direct food safety consequences.
Floods contaminate food production areas and water supplies with pathogens, destroy refrigeration and storage infrastructure, and disrupt food supply chains in ways that force consumers to rely on unsafe alternatives. Droughts stress crops, making them more susceptible to mold infection and mycotoxin accumulation; they also reduce the diluting capacity of water bodies, concentrating environmental contaminants. Heat waves increase the growth rate of Salmonella and other mesophilic pathogens in food held at ambient temperature. Ocean warming and acidification are expanding the range of harmful algal blooms that produce toxins accumulating in seafood.
Modeling studies project that, under current emissions scenarios, the incidence of foodborne Salmonella and Campylobacter infections will increase by 5 to 10 percent in many developing regions by 2050, with larger increases in the most warming-vulnerable areas. Aflatoxin contamination of maize in sub-Saharan Africa is projected to increase substantially as temperatures rise and rainfall patterns shift. These projections underscore the urgency of integrating food safety into climate change adaptation planning, rather than treating it as a separate silo.
Illustrations are not included in the reading sample
Table 3.1: Summary of structural food safety challenges, mechanisms, and priority interventions by category.
Chapter 4: The Informal Food Sector — Risks, Realities, and Pathways to Improvement
In developing countries, the informal food sector is not a marginal phenomenon — it is the main source offood forthe majority ofthe population. Understanding its dynamics, food safety risks, and potential forimprovement is essential to any meaningful food safety strategy.
4.1 Defining and Characterizing the Informal Food Sector
The informal food sector encompasses food production, processing, and distribution activities that operate outside formal regulatory frameworks, or that are nominally registered but do not consistently comply with applicable regulations. It includes street food vending (hot and cold prepared foods sold in public spaces), wet markets and traditional open-air food markets, homebased food production and catering, small-scale artisanal food processing enterprises, and informal food transport and distribution. In many developing countries, the informal sector accounts for 60 to 80 percent of total food consumption, rising to over 90 percent in the lowest- income settings.
Street food in particular plays a vital social and economic role in developing country cities. It provides affordable, accessible, and culturally appropriate meals for low-income urban workers who lack kitchen facilities at their workplaces and cannot afford restaurant meals. It provides livelihoods for millions of small-scale entrepreneurs — predominantly women — for whom food vending is a critical source of income and economic independence. And it preserves and transmits culinary traditions and cultural identities that are central to social life in many communities.
The food safety picture in the informal sector is farfrom uniformly negative. Many informal food vendors produce safe food, drawing on deep practical knowledge offood preparation, cultural food safety traditions (fermentation, cooking methods, spicing), and strong social incentives to maintain quality — their livelihoods depend on repeat customers. However, systematic assessments across many developing countries consistently identify significant food safety risks in the informal sector, particularly related to temperature control, cross-contamination, water quality, and personal hygiene.
4.2 Food Safety Risks in Informal Markets and Street Food
Microbiological contamination is the most prevalent food safety risk in the informal food sector. Studies from across Africa, Asia, and Latin America find high rates of coliform bacteria, E. coli, and Salmonella in street food samples, ready-to-eat foods, and products sold in informal markets. The risk factors are closely linked to physical infrastructure: vendors who lack access to clean water for handwashing and equipment cleaning, who cannot maintain hot foods at safe serving temperatures or cold foods below 5°C, and who operate in environments where flies, dust, and other contaminants are impossible to control.
Temperature abuse is perhaps the single most important food safety failure in the informal sector. Cooked foods held at ambient temperature in tropical climates (25-35°C) provide ideal conditions for the growth of Staphylococcus aureus, Bacillus cereus, and other pathogens that can reach dangerous concentrations within two to four hours. The practice of cooking large batches in the morning and selling throughout the day without temperature control is particularly risky. Consumer awareness of this risk is often limited, and visual or olfactory cues cannot reliably distinguish safe from unsafe food.
Chemical hazards are also present in the informal sector. Use of unauthorized colorants to enhance the visual appeal of foods, preservation offish and meat with excessive levels of salt or smoke containing carcinogenic polycyclic aromatic hydrocarbons, and the use of non-foodgrade packaging materials (recycled drums, plastic bags not designed for food contact) all contribute to chemical contamination risk. In informal spice markets, adulteration with cheaper materials is common, as documented in studies from South Asia, West Africa, and Southeast Asia.
4.3 Gender, Livelihoods, and the Politics of Regulation
The gender dimensions of the informal food sector are significant and must be explicitly considered in food safety policy. In most developing countries, women constitute 60 to 80 percent of informal food vendors, and for many of them food vending represents their primary or sole source of income. Food safety interventions that increase compliance costs, impose licensing requirements without accessible support for compliance, or confiscate or destroy food products without due process disproportionately harm women vendors and undermine gender equality objectives.
Heavy-handed regulatory enforcement in the informal food sector — mass evictions of street vendors, confiscation and destruction of food products, arrest of vendors who lack licenses — is common in many developing countries and is typically counterproductive from both a food safety and a development perspective. Vendors driven underground or forced to relocate to less visible sites are harder, not easier, to reach with food safety support. Vendors deprived of their income are less, not more, able to invest in food safety improvements.
An alternative regulatory philosophy — sometimes called 'enabling regulation' or 'regulatory support' — focuses on creating the conditions under which informal food businesses can improve their food safety practices: providing access to clean water at vending sites; designating and maintaining sanitary vending spaces; delivering training in local languages using practical, demonstration-based approaches; establishing registration systems that are simple, affordable, and linked to tangible benefits; and enforcing standards proportionally, targeting the most serious risks while supporting incremental improvement.
4.4 Formalization Pathways and Their Limits
'Formalization' — the movement of informal food businesses into formal regulatory compliance — is often proposed as the solution to informal sector food safety problems. In principle, a registered, inspected, and certified food business operating within a regulated framework should be safer than an unregistered, uninspected one. In practice, the relationship between formalization and food safety is more complex.
First, the costs of formalization — registration fees, facility requirements, testing costs, time spent on regulatory compliance — can be prohibitive for the smallest and poorest businesses, with the result that formalization policies may simply transfer consumption to larger, formally regulated businesses rather than improving the safety of the food already being consumed by poor consumers. Second, formal registration and certification do not guarantee safe practices: a registered business can still have poor temperature control, inadequate handwashing facilities, or food handler illness, and inspection capacity in most developing countries is far too limited to provide meaningful oversight of the many businesses that would be formally regulated. Third, many informal food sector actors operate in the grey zone between formal and informal, with some regulatory compliance and some non-compliance, and simple binary formalization/informality categories do not capture this complexity.
A more productive framing focuses on 'upgrading' — the continuous improvement of food safety practices across the informal sector— rather than a discrete transition from informal to formal. Upgrading supports vendors to incrementally improve their practices, infrastructure, and management, recognizes and rewards improvement even when full formal compliance has not been achieved, and works with the grain of informal sector dynamics rather than against them.
4.5 The Role of Consumer Demand in Driving Informal Sector Safety
Consumer behavior and preference play an important role in shaping food safety in the informal sector. When consumers demand and are willing to pay a premium for safe food — when they actively seek out vendors with clean preparation areas, reject foods that show signs of contamination, and report food safety concerns — the economic incentives for informal vendors shift toward safer practices. Building consumer food safety literacy and confidence is therefore not only a direct food safety intervention but an indirect lever for improving the informal food supply.
Several developing country programs have successfully leveraged consumer demand to drive informal sector food safety improvement. 'Safe food' branding and certification systems — such as the 'Safe Food Market' initiative in Vietnam and similar programs in South Africa and Ecuador — provide consumers with visible quality signals and give vendors competitive advantages for meeting enhanced safety standards. Consumer protection organizations and media campaigns can also play important roles in maintaining public attention to food safety in the informal sector.
Chapter 5: Technological Innovation for Food Safety in Resource-Limited Settings
A new generation of technologies is transforming the possibilities for food safety management in resource-limited settings. This chapter examines the most promising technological innovations — from rapid diagnostics to digital platforms — and assesses their feasibility, cost, and prospects forscaling in developing country contexts.
5.1 Rapid and Point-of-Need Diagnostics
Traditional microbiological and chemical testing methods require laboratory infrastructure, refrigeration for reagents, skilled technical personnel, and 24 to 72 hours for results — constraints that make them impractical for many food safety applications in developing countries. Rapid testing technologies are transforming this landscape, enabling accurate, actionable food safety testing at or near the point of need — in the field, at the farm gate, at market entry points, or in small laboratories without sophisticated infrastructure.
Lateral flow immunoassay (LFI) tests — commonly known as dipstick tests — represent the most widely deployed category of rapid food safety diagnostics. They detect specific antigens (pathogen surface proteins or toxins) using antibody-conjugated colored particles, producing a visual positive/negative result within 5to15 minutes with no equipment required. Commercially available LFI tests exist for aflatoxin B1, fumonisin B1, deoxynivalenol, ochratoxin A, Salmonella, Campylobacter, Listeria, major pesticide groups, and an expanding range of veterinary drug residues. Sensitivity and specificity have improved dramatically, and costs have fallen to USD 1 to 5 per test for many applications — within reach for commercial use in developing country food supply chains.
Biosensor technologies represent the next generation of rapid food safety diagnostics, offering higher sensitivity, greater multiplexing capacity (simultaneous detection of multiple analytes), and the potential for real-time quantitative measurement. Electrochemical biosensors detect target analytes through changes in electrical properties; optical biosensors use changes in light properties; and mass-sensitive biosensors detect mass changes on a sensor surface. Research groups in several developing countries, including India, China, and Brazil, are developing biosensor platforms specifically optimized for low-resource settings — using smartphones as signal readers, incorporating ambient-stable reagents, and designing for operation without refrigeration or stable power supply.
Loop-mediated isothermal amplification (LAMP) and other nucleic acid amplification techniques offer the specificity of molecular diagnostics without the thermal cycler required for conventional PCR. LAMP reactions proceed at a single temperature (60-65°C), can be performed using simple heating blocks or even hot water baths, and can be read visually. Field-deployable LAMP assays have been developed for Salmonella, Campylobacter, E. coli 0157, Listeria, and several mycotoxigenic fungi, and have been validated in developing country field settings with promising results.
5.2 Digital Technologies, Data, and the Internet ofThings
The proliferation of mobile phones, internet connectivity, and low-cost electronic sensors is creating new possibilities for food safety management that are particularly relevant for developing countries. Mobile phone penetration now exceeds 80 percent in many developing countries, including in rural areas and among low-income populations — providing a platform for food safety information exchange, consumer reporting, regulatory compliance verification, and supply chain traceability that would have been unimaginable two decades ago.
Temperature-monitoring sensors and Internet of Things (loT) devices can now be deployed throughout the cold chain at low cost, continuously recording temperature and transmitting data to cloud platforms where they can be analyzed and flagged for deviations from safe ranges. Solar-powered cold chain monitoring systems designed for resource-constrained settings — including those without reliable grid electricity — are commercially available and have been piloted in East Africa and South Asia with demonstrated reductions in temperature excursions and post-harvest losses. The data generated by these systems can also provide the evidence base for cold chain improvement investments, prioritizing interventions at the highest-risk points in the chain.
Mobile-based consumer complaint and food safety reporting platforms enable consumers and food handlers to report food safety concerns to regulatory authorities in real time, supplementing formal surveillance systems with a community-based detection layer. In China, the 'Snap and Report' feature of the government's food safety platform allows consumers to photograph suspected food safety violations and submit them directly to regulatory inspectors. Similar systems have been piloted in Kenya, South Africa, and India, with varying degrees of integration into formal regulatory response mechanisms.
Blockchain for Food Traceability in Developing Countries
Blockchain technology — a distributed, tamper-resistant ledger — offers a novel approach to food traceability: creating a complete, immutable record of a food product's journey from farm to consumer that can be rapidly accessed by any party in the supply chain. Several pilot programs in developing countries are exploring blockchain-based food traceability: a project tracing mangoes from Kenyan smallholder farms to European supermarkets; a platform certifying organic produce from Indian farmer collectives; a system tracking fish from Indonesian fishing vessels to export processing plants. The technology's primary food safety contribution is enabling rapid, precise traceback in the event of a contamination incident — identifying the source quickly, recalling affected products, and preventing the unnecessary withdrawal of safe products. Key challenges include the cost and connectivity requirements of blockchain infrastructure, the data quality challenge at the farm level (blockchain cannot verify the accuracy of data entered by participants), and the risk that traceability systems benefit primarily large exporters while leaving domestic supply chains unchanged.
5.3 Improved Post-Harvest Technologies
Post-harvest losses in developing countries are enormous — averaging 30 to 40 percent for horticultural products in sub-Saharan Africa — and a significant proportion of these losses are associated with food safety failures: mycotoxin contamination of inadequately dried grain, pathogen growth on inadequately cooled produce, and physical damage creating entry points for spoilage organisms. Technologies that reduce post-harvest losses therefore also reduce food safety risks, and food safety considerations should be integrated into post-harvest loss reduction programs.
Hermetic storage technologies, which create an oxygen-depleted, insect-proof environment for stored grain and legumes, have proven highly effective in reducing both physical losses and mycotoxin contamination. The PICS (Purdue Improved Crop Storage) hermetic bag, which uses a triple-layer plastic bag design to create a hermetic seal, has been widely deployed across subSaharan Africa and South Asia through social marketing campaigns and has demonstrated 80 to 99 percent reductions in aflatoxin contamination compared to traditional woven sack storage. Larger-scale hermetic metal silos and warehouse-scale hermetic storage systems extend the same principle to community and commercial scales.
Modified atmosphere packaging (MAP), active packaging technologies incorporating antimicrobial agents or oxygen scavengers, and edible coatings for fresh produce all offer potential to extend the shelf life of perishable foods and reduce microbial contamination risk during distribution and retail. While these technologies have been standard in developed country food industries for decades, declining equipment costs and growing technical capacity are making them increasingly accessible to food processors and exporters in developing countries.
Solar food drying represents an important improvement over traditional open-air drying for the processing offish, fruit, vegetables, and grains in tropical settings. Solar dryers achieve higher temperatures, shorter drying times, and lower final moisture content than open-air drying, reducing mold growth, mycotoxin accumulation, and insect infestation. They also protect food from environmental contamination — dust, insects, birds, rain — that is endemic in traditional open-air drying. A wide range of solar dryer designs have been developed and field-tested in developing country contexts, from individual family-scale units to community-scale tunnel dryers.
5.4 Biocontrol and Biological Approaches
Biological approaches to food safety control — harnessing living organisms or their products to reduce or eliminate food safety hazards — offer the potential for safe, sustainable, and costeffective interventions that may be particularly well-suited to developing country contexts where synthetic chemical inputs are expensive and their misuse is common.
Competitive exclusion and biocontrol approaches exploit the ability of non-pathogenic or non- toxigenic microorganisms to outcompete or suppress their harmful counterparts. The most extensively developed biocontrol product for food safety in developing countries is Aflasafe, developed by the International Institute of Tropical Agriculture (IITA), which uses a mixture of non-aflatoxigenic strains of Aspergillus flavus that are applied to crops before harvest to colonize the plant before toxigenic strains can establish themselves. Field trials in Nigeria, Kenya, Senegal, Burkina Faso, and Zambia have demonstrated reductions in aflatoxin contamination of 80 to 99 percent. Aflasafe and related products are now being registered for commercial use across Africa.
Bacteriophage therapy — the use of bacteriophages (viruses that specifically infect bacteria) to control foodborne bacterial pathogens — represents another promising biological approach. Phage cocktails targeting Salmonella, Listeria monocytogenes, and E. coli O157:H7 in food production environments are already approved for use in several countries. Phage treatments can be applied directly to food contact surfaces, added to irrigation water, or applied to food products at critical points in the production process. Their high specificity means they target pathogens without disrupting the beneficial microbiota offermented or cultured foods, and they leave no chemical residues.
5.5 Data Science and Predictive Food Safety
The application of data science — including machine learning, artificial intelligence, and big data analytics — to food safety is a rapidly developing field with considerable potential for improving food safety outcomes in developing countries. Predictive food safety models can integrate data from multiple sources — weather patterns, supply chain records, epidemiological surveillance, social media monitoring, and regulatory inspection histories — to identify supply chains and time periods at elevated risk of food safety failures, enabling proactive intervention rather than reactive response.
In the United States and European Union, machine learning models are already being used to target food safety inspections toward the restaurants and food processing facilities most likely to have compliance problems, significantly improving the efficiency of regulatory oversight. Similar approaches are being piloted in China, India, and Brazil. The data requirements for these models — high-quality, longitudinal food safety and epidemiological data — represent a significant barrier to their deployment in most developing countries, underscoring the importance of investing in food safety data infrastructure as a prerequisite for the adoption of advanced analytical approaches.
Chapter 6: Good Agricultural Practices and Farm-Level Food Safety
Agricultural production is where food safety begins. The practices of farmers, herders, fishers, and aquaculturalists in producing, harvesting, and primary processing food determine much of its safety profile throughout the rest of the chain. This chapter examines food safety management at the farm level, with emphasis on practical approaches for smallholder producers in developing countries.
6.1 The GAP Framework
Good Agricultural Practices (GAP) refers to the principles and practices that, when applied in agricultural production, promote safety, sustainability, and quality of food and agricultural products. GAP encompasses a broad range of practices across the production cycle: soil management (preventing contamination by pathogens, heavy metals, and persistent organic pollutants); water management (ensuring safe quality of irrigation and washing water); crop protection (safe and appropriate use of pesticides and other inputs); harvesting (hygienic harvesting to prevent contamination and physical damage); post-harvest handling (maintaining hygiene and temperature during sorting, grading, and storage); and farm worker welfare (ensuring that food safety is not undermined by workers with infectious illness).
The Codex Alimentarius Commission's Code of Hygienic Practice for Fresh Fruits and Vegetables (CAC/RCP 53-2003) provides the international GAP standard forthe fresh produce sector. National GAP standards — typically developed by agriculture ministries in consultation with industry and civil society — adapt the Codex framework to local conditions. Private GAP certification schemes, particularly GlobalGAP, have become important requirements for agricultural exporters supplying major international retailers.
For smallholder farmers in developing countries, full formal GAP certification can be an aspiration for the future rather than an immediate option. The documentation requirements, inspection fees, and infrastructure investments associated with certification are often beyond the means of very small farms without external support. However, the practical food safety principles underlying GAP can be implemented incrementally and at low cost, and extension services can play a vital role in supporting smallholder adoption ofgood practices.
6.2 Water Quality in Agricultural Production
Water quality is one of the most critical food safety determinants in agricultural production and one of the most challenging to manage in developing country smallholder contexts. Irrigation water from rivers, ponds, and open canals in agricultural areas in developing countries frequently contains fecal coliforms and specific pathogens including E. coli, Salmonella, and Cryptosporidium, reflecting the contamination of surface waters with untreated sewage, agricultural runoff, and livestock waste. When this water contacts the edible parts of fresh produce crops — a particular risk with overhead irrigation systems — it directly deposits pathogens on the food.
Several studies in Ghana, Ethiopia, Tanzania, and Vietnam have documented high rates of Salmonella and E. coli contamination on leafy vegetables irrigated with contaminated water, at levels that would pose unacceptable health risks to consumers eating the vegetables raw. Since washing of contaminated produce with clean water may not fully eliminate these pathogens, water quality management must begin at the irrigation stage rather than at post-harvest washing.
Practical options for managing irrigation water quality in resource-constrained settings include: where possible, switching from overhead/furrow irrigation to drip irrigation, which applies water to the root zone rather than the edible aerial parts of the plant; using treatment techniques such as chlorination or UV treatment for small-scale irrigation systems where concentrated water supply makes treatment feasible; adhering to required intervals between last irrigation and harvest (typically 14 days or more) to allow pathogen die-off; and selecting crop types and varieties where the edible part is protected from direct water contact.
6.3 Soil Health and Contamination Prevention
Soil management practices have direct and indirect effects on food safety. The application of animal manure as a soil amendment is a common and agronomically valuable practice in smallholder farming, but raw or incompletely composted manure contains pathogenic bacteria, parasites, and sometimes antibiotic-resistant organisms that can contaminate produce if applied close to harvest. Composting or anaerobic digestion of manure to eliminate pathogens before land application, and maintaining required intervals between manure application and harvest, are critical food safety practices.
Heavy metal contamination of soils is a growing concern in peri-urban agricultural areas in developing countries, where soils may be contaminated by industrial emissions, vehicle exhaust, improper disposal of batteries and electronic waste, and the use of untreated wastewater for irrigation. Cadmium, lead, arsenic, and mercury accumulated in soils over decades can be taken up by food crops, particularly leafy vegetables and root crops, at levels that pose health risks to consumers. Mapping of soil heavy metal contamination around urban and industrial areas, and restricting food crop production on contaminated sites, are important preventive measures.
6.4 Integrated Pest Management and Safe Pesticide Use
The promotion of Integrated Pest Management (IPM) — an ecosystem-based approach to pest control that minimizes pesticide use through the combination of biological control, resistant varieties, cultural practices, and targeted use of pesticides as a last resort — represents an important strategy for reducing pesticide residues on food while maintaining effective crop protection. IPM has been successfully promoted among smallholder farmers in numerous developing countries, with documented reductions in pesticide use and associated cost savings, as well as improved food safety outcomes.
Where pesticide use is necessary, safe practices are critical: using only registered pesticides; using the correct rate and timing of application; strictly observing required pre-harvest intervals; wearing appropriate personal protective equipment; and safely disposing of pesticide containers. Agricultural extension services have a key role in training farmers in safe pesticide use, and regulatory agencies must ensure that registered pesticide labels are accurate, complete, and in a language and format accessible to farmers.
The availability of banned or severely restricted pesticides on informal agricultural input markets is a persistent challenge in many developing countries. Pesticides banned in their countries of manufacture are sometimes exported and sold in developing country markets where regulatory capacity to detect and prevent their sale is limited. Strengthening border controls, investing in pesticide import registration, and actively monitoring informal pesticide markets are important regulatory priorities.
6.5 Animal Husbandry and Zoonotic Disease Control
In mixed farming systems — where crops and livestock are produced together, often in close proximity to human habitation — animal health and food safety are deeply interconnected. Livestock serve as reservoirs for major foodborne pathogens including Salmonella, Campylobacter, E. coli 0157, Cryptosporidium, Toxoplasma, and Brucella. Management practices that reduce pathogen carriage in livestock, prevent contamination of the farm environment, and control movement of pathogens from animals to food and humans are therefore critical food safety measures.
Vaccination of livestock against foodborne zoonoses is an important but underutilized food safety tool in many developing countries. Salmonella vaccination of poultry flocks, Brucella vaccination of cattle, and T. solium vaccination of pigs have all demonstrated effectiveness in reducing zoonotic transmission and have been deployed with success in some developing country contexts. Expanding coverage of livestock vaccination programs — particularly for food animals in peri-urban areas supplying urban food markets — offers significant food safety cobenefits alongside animal health gains.
6.6 Post-Harvest Handling and Storage
The transition from field to storage and transport is a critical juncture for food safety and quality. Physical damage during harvesting — cuts, bruises, and abrasions — creates entry points for mold and bacterial infection that can develop into mycotoxin contamination and spoilage. Inadequate drying of harvested grain before storage is the primary driver of aflatoxin and fumonisin contamination ofcereals and legumes in tropical developing countries.
Rapid cooling of fresh produce after harvest — field heat removal — is among the most effective food safety and quality interventions available, but requires infrastructure (cold storage, refrigerated transport) that is often absent in developing country supply chains. Low-cost alternatives include pre-cooling with water (hydrocooling), evaporative cooling, and shade storage. For smallholder farmers without access to any cooling infrastructure, selection of production systems and market channels that minimize the time from harvest to sale is an important risk mitigation strategy.
Chapter 7: Food Safety in Processing and Manufacturing
Food processing transforms raw agricultural materials into intermediate and finished food products. This chapter examines food safety management in processing contexts across the spectrum from artisanal home-based processing to large-scale industrial manufacturing, with special attention to the challenges and opportunities specific to developing countries.
7.1 HACCP: Principles and Practical Application
Hazard Analysis and Critical Control Points (HACCP) is the globally recognized, science-based approach to food safety management in food processing. Developed initially for NASA's space program in the early 1960s to ensure the safety of food for astronauts, HACCP has become the international gold standard for food safety management systems, mandated or strongly encouraged by food safety legislation and international food safety standards in over 100 countries. The Codex Alimentarius Commission's General Principles of Food Hygiene (CXC 11969) — the foundational international food safety document — incorporates HACCP as its food safety management approach.
HACCP is built on seven principles: (1) conduct a hazard analysis to identify and evaluate biological, chemical, and physical hazards associated with the food product and production process; (2) determine the Critical Control Points (CCPs) — steps in the process at which control measures can be applied to prevent, eliminate, or reduce hazards to acceptable levels; (3) establish critical limits for each CCP — the criteria that distinguish safe from unsafe operation; (4) establish monitoring procedures to assess whether each CCP is under control; (5) establish corrective action procedures to follow when monitoring indicates a CCP is not under control; (6) establish verification procedures to confirm that the HACCP system is working effectively; and (7) establish documentation and record-keeping procedures.
The application of HACCP in small and medium-sized food enterprises (SMEs) in developing countries faces significant practical challenges. Developing a HACCP plan requires a solid foundation of food science and microbiology knowledge that many small food business operators lack; the technical support needed for HACCP implementation (hazard analysis, validation of critical limits, laboratory testing for verification) may not be readily available or affordable; and the administrative and documentation requirements of full HACCP may be impractical for very small enterprises. Simplified HACCP-based approaches — sometimes called 'small business HACCP' or 'operational prerequisite program (oPRP)-based systems' — have been developed to address these barriers, maintaining the risk-based logic of HACCP while reducing the documentation burden for low-risk, small-scale operations.
7.2 Good Manufacturing Practices and Prerequisite Programs
Good Manufacturing Practices (GMP) are the basic sanitary and operational conditions required to produce safe food in a food processing facility. GMP encompasses facility design and maintenance (materials, drainage, ventilation, pest proofing); equipment design, installation, and maintenance; cleaning and sanitation programs; personal hygiene requirements for food handlers; temperature and time control for food storage and processing; and quality control procedures. GMP — together with programs for pest control, allergen management, equipment calibration, and supplier approval — constitute the 'prerequisite programs' that must be in place as the foundation for a HACCP system.
For many small-scale food processors in developing countries, achieving GMP compliance is the most immediate and achievable food safety improvement goal. Unlike the full HACCP system, which requires systematic hazard analysis and documentation, GMP improvements can be implemented incrementally, targeting the most critical food safety risks first: installing handwashing stations at processing entry points, separating raw material and finished product storage areas, repairing or replacing damaged surfaces that cannot be adequately cleaned, establishing a cleaning and sanitation schedule, and providing training and health screening for food handlers.
The concept of a 'food safety improvement journey' — in which food businesses progressively strengthen their food safety management systems over time, moving from basic GMP compliance toward full HACCP implementation — is more realistic for most developing country SMEs than an expectation of immediate full compliance. Regulatory approaches that recognize and reward incremental improvement, rather than applying all-or-nothing enforcement standards, are more likely to drive sustained food safety progress in the SME sector.
7.3 Traditional Fermented Foods — Safety and Modernization
Fermented foods are dietary staples across much of the developing world, produced and consumed in extraordinary diversity: fermented maize porridges (ogi, akamu, uji) in West and East Africa; fermented cassava products (gari, fufu, lafun) in West Africa; injera sourdough flatbread in Ethiopia and Eritrea; fermented dairy products (yogurt, kefir, ayran) across the Middle East and Central Asia; tempeh, miso, and natto in Southeast and East Asia; kvass in Eastern Europe and the former Soviet Union; and hundreds of regional variants. Traditional fermentation — typically lactic acid fermentation — provides multiple food safety benefits: acidification that inhibits most enteric pathogens, production of bacteriocins and other antimicrobial compounds, and competitive exclusion ofspoilage organisms.
The food safety track record of traditional fermented foods is generally good, reflecting the accumulated wisdom of communities that have refined fermentation processes over generations to achieve safe and reliable outcomes. However, the modernization of fermented food production — scaling up from household to commercial production, extending shelf life for longer distribution chains, adapting for urban markets with different storage conditions — introduces new food safety challenges. The protective acid environment that makes traditional fermented foods safe may be compromised by dilution, temperature abuse, or the addition of nonfermented ingredients in commercial products.
Contamination of fermented foods with mycotoxins is a significant concern where the raw materials used in fermentation — maize, cassava, groundnuts, sorghum — may themselves be contaminated. While fermentation does not reliably reduce mycotoxin levels, and may in some cases increase them through the action of mold enzymes, there is evidence that certain fermentation processes (particularly extended lactic acid fermentation) can bind or degrade some mycotoxins. Understanding the food safety implications of specific fermentation processes for specific mycotoxin hazards is an important area for applied research.
7.4 Food Fortification and Food Safety
Food fortification — the deliberate addition of micronutrients to widely consumed food vehicles — is an important strategy for addressing micronutrient deficiencies in developing countries. Major fortification programs include iodization of salt, fortification of wheat and maize flour with iron, folic acid, and B vitamins, fortification of vegetable oils with vitamin A and D, and fortification of sugar with vitamin A in Central America. These programs have achieved impressive public health outcomes but also raise food safety considerations that are often overlooked.
The quality control of fortification — ensuring that the correct levels of micronutrients are added consistently throughout the production process — is a food safety matter as well as a nutritional efficacy matter. Overfortification of some nutrients, particularly fat-soluble vitamins (A and D) and minerals (iron, zinc), can cause toxicity at levels that might be reached if quality control fails. Regulatory oversight of fortification programs, including regular monitoring of micronutrient levels in fortified food products available on the market, is an important food safety function that is frequently inadequate in developing countries.
7.5 Cold Chain Management in Food Manufacturing
Temperature control is the single most powerful and widely applicable tool for controlling microbial food safety hazards in food processing and distribution. Most foodborne pathogens grow rapidly between 5°C and 60°C (the 'danger zone'), with doubling times as short as 20 minutes for some organisms at optimal temperatures. Maintaining food at temperatures outside this range throughout processing, storage, and distribution is the core principle of cold chain management.
In developing country food processing contexts, cold chain failures take multiple forms. Refrigeration equipment may be inadequate, unreliable, or absent. Temperature monitoring may be manual and infrequent. Staff training on the importance of temperature control may be limited. The physical infrastructure of facilities — ambient temperature, ventilation, insulation — may create challenging conditions for cold chain maintenance. And the electricity supply, as noted, may be unreliable.
Addressing cold chain failures requires both investment in physical infrastructure (reliable refrigeration, insulated transport vehicles, properly designed facilities) and management system improvements (temperature monitoring, standard operating procedures, staff training, corrective action protocols for temperature excursions). In settings where full cold chain infrastructure is not feasible, risk management approaches — choosing product formulations or processing methods that reduce temperature sensitivity, reducing batch sizes to minimize the time food spends in the danger zone, and shortening distribution chains — can partially compensate for infrastructure limitations.
Chapter 8: Food Safety Regulation and Policy Architecture
Regulation is the foundation on which national food safety systems are built. This chapter examines the principles of effective food safety regulation, the institutional architectures of national systems, the role of international standards bodies, and the complex intersection of food safety regulation and international trade policy.
8.1 Principles of Effective Food Safety Regulation
Effective food safety regulation is grounded in a set of principles that together ensure that regulatory action is scientifically sound, proportionate to risk, fair, transparent, and effective in protecting public health. The risk analysis framework — comprising risk assessment, risk management, and risk communication — is the internationally recognized scientific and procedural foundation for food safety regulation. Risk assessment provides the scientific evaluation of the nature and magnitude of a food safety risk; risk management uses that evaluation, combined with other considerations (economic, social, technological feasibility), to develop and implement appropriate control measures; and risk communication ensures that all relevant information is exchanged effectively among risk assessors, risk managers, and all other interested parties.
The precautionary principle holds that when there is scientific uncertainty about a potential hazard, precautionary measures may be taken even in the absence of definitive proof of harm, provided the measures are proportionate to the potential risk, non-discriminatory, and subject to review as new scientific information becomes available. This principle, embedded in the WTO's Agreement on Sanitary and Phytosanitary Measures and national legislation in many jurisdictions, is an important backstop against regulatory paralysis in the face of uncertain but potentially serious risks.
Proportionality and risk-based regulation — directing regulatory attention and resources toward the hazards and activities that pose the greatest actual risks to public health — is both scientifically appropriate and practically necessary given the severe resource constraints facing regulatory agencies in most developing countries. A regulatory inspection system that allocates the same level of scrutiny to a multinational food processing company and a rural home baker is neither efficient nor equitable. Risk-based prioritization, informed by hazard analysis, exposure assessment, and vulnerability of consumer populations, should guide the allocation of regulatory resources.
Transparency and participatory governance in food safety standard-setting are important both intrinsically — as expressions of democratic accountability — and instrumentally. Standards developed through open, inclusive, evidence-based processes that engage industry, consumers, scientists, and civil society are more likely to be scientifically sound, practically feasible, and broadly accepted. They are also more likely to be effectively implemented, because regulated parties who participated in developing the standards are more likely to understand their rationale and to comply voluntarily.
8.2 National Food Safety System Architecture
National food safety systems vary widely in their institutional architecture, reflecting historical legacies, political systems, and the specific food safety challenges each country faces. At one end of the spectrum, some countries have established unified, integrated food safety authorities with comprehensive responsibility for all aspects of food safety regulation from primary production through to final consumption — the European Food Safety Authority (EFSA, scientific advisory function) and the UK Food Standards Agency are examples of this integrated model. At the other end, food safety responsibilities may be distributed among multiple ministries and agencies — agriculture, health, trade, environment, consumer affairs — with limited coordination and significant gaps and overlaps.
Most developing countries operate some variant of the fragmented multi-agency model. The Ministry ofAgriculture may regulate food safety at the farm level and in agricultural processing; the Ministry of Health may be responsible for food hygiene in retail and food service; the Ministry ofTrade may control food imports and exports; and a standards agency may set compositional and labeling standards. In practice, coordination among these agencies is often poor, accountability is diffuse, and the consumer who falls ill from a foodborne pathogen has little recourse or even awareness of which authority is responsible.
Many developing countries have undertaken food safety institutional reform over the past two decades, driven by high-profile food safety incidents, pressure from trading partners, requirements of bilateral trade agreements, and the recommendations of international technical assistance programs. Common reform directions include consolidation of food safety functions into fewer, better-resourced agencies; creation of inter-agency food safety coordination mechanisms; clarification of mandates and accountability; and investment in technical capacity including laboratory infrastructure and inspection capability.
8.3 The Codex Alimentarius and International Standard-Setting
The Codex Alimentarius Commission (CAC), established in 1963 as a joint body of the Food and Agriculture Organization (FAO) and the World Health Organization (WHO), is the international standard-setting body for food safety and quality. Codex standards, guidelines, and codes of practice cover hundreds of specific food safety concerns — maximum residue limits for pesticides, maximum levels for mycotoxins and heavy metals, hygienic requirements for specific food categories, food labeling standards, methods of analysis, and much more — and provide the international benchmark against which national food safety measures are assessed under the WTO Agreement on Sanitary and Phytosanitary Measures (SPS Agreement).
The significance of Codex for developing countries is immense: products that do not meet Codex standards may be excluded from major export markets; countries that maintain food safety measures stricter than Codex standards must justify them with scientific risk assessment; and countries whose domestic standards are well below Codex may face pressure to strengthen them as a condition of trade relationships. Meaningful participation in Codex standard-setting processes is therefore both a food safety priority and a trade policy necessity for developing countries.
However, developing country participation in Codex has historically been constrained by multiple barriers: the cost of attending meetings (two to three major meetings per year in Rome and Geneva, plus subsidiary committee meetings around the world); the technical preparation required to engage substantively with standard proposals; language barriers; and the capacity to conduct risk assessments needed to develop and defend country positions. The Codex Trust Fund, established in 2003 with donor support, has partially addressed the financial barriers to participation, funding attendance by developing country delegates. Regional Coordinating Committees within Codex provide forums for developing country coordination of positions on major standard-setting issues.
8.4 Food Safety and International Trade: Opportunities and Tensions
The intersection of food safety regulation and international trade is one of the most contested areas in global economic governance. On one hand, food safety standards are legitimate national public health measures that protect consumers from hazardous imported food. On the other hand, food safety requirements can function as non-tariff barriers to trade — measures ostensibly designed to protect public health but in practice serving to protect domestic producers from import competition by imposing standards that foreign exporters cannot meet. The WTO's SPS Agreement attempts to navigate this tension by permitting countries to set food safety standards above the international (Codex) benchmark, but only when justified by a scientific risk assessment.
For developing country agricultural exporters, meeting the food safety standards of importing countries is a necessary condition for export market access and a significant driver offood safety investment. The requirements of the EU, United States, Japan, and other major markets — Codex-based MRLs for pesticides, microbiological criteria, traceability requirements, and mandatory certification — have prompted substantial improvements in food safety management in exporting sectors across the developing world. However, these improvements have often been concentrated in export-oriented sectors, with limited spillover to the domestic food systems that feed the majority of the population.
Private food safety standards set by major retailers and food companies — including GlobalGAP, the British Retail Consortium (BRC) standard, the Safe Quality Food (SQF) standard, and the International Featured Standards (IFS) — have in many cases become more stringent and more practically significant for developing country exporters than the official Codex-based standards. These private standards may drive food safety improvements but also raise concerns about market access exclusion of smaller producers who cannot afford certification costs, and about the accountability of private standard-setting processes that lack the transparency and participation of public regulatory processes.
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Table 8.1: Application of food safety regulatory principles in LMIC contexts and key implementation challenges.
Chapter 9: Foodborne Disease Surveillance and Outbreak Response
Detecting foodborne disease outbreaks quickly, identifying their causes, and implementing effective controls requires robust surveillance systems, strong laboratory networks, and practiced response mechanisms. This chapter examines the principles and current state of foodborne disease surveillance in developing countries, with emphasis on practical approaches to strengthening detection and response capacity.
9.1 Functions and Architecture of Surveillance Systems
Foodborne disease surveillance is the systematic, continuous collection, collation, analysis, interpretation, and dissemination of data on the occurrence of foodborne illness for the purpose of public health action. A well-functioning surveillance system serves multiple interconnected purposes: it detects clusters and outbreaks of foodborne illness early enough for control measures to limit the number of cases; it tracks trends in the incidence and distribution of specific foodborne pathogens over time; it identifies emerging hazards and new contamination sources before they cause widespread illness; it provides the epidemiological foundation for risk assessments and food safety policy decisions; and it measures the impact of food safety interventions on disease burden.
The architecture of foodborne disease surveillance in most countries comprises multiple layers: passive clinical surveillance, in which clinicians and laboratories report cases of foodborne illness and specific pathogens to public health authorities; active surveillance programs that systematically search for cases in defined populations or sentinel sites; outbreak investigation capacity that can respond rapidly when clusters are detected; laboratory-based surveillance that characterizes the molecular and phenotypic profiles of pathogens for source attribution and epidemiological typing; and food contamination monitoring programs that test foods for hazards before they reach consumers.
In most developing countries, all of these surveillance components are either absent or severely underdeveloped. Clinical surveillance systems frequently lack standardized case definitions for foodborne illness, making it impossible to distinguish foodborne gastroenteritis from other causes. Laboratory infrastructure for pathogen identification is limited, and even where it exists, results may not be reported to public health surveillance systems in a timely and complete way. Outbreak investigation capacity — epidemiologists who can conduct field investigations, collect specimens, and analyze outbreak data — is often concentrated in capital cities, leaving outbreaks in rural areas undetected or uninvestigated.
9.2 Laboratory Capacity: The Foundation ofSurveillance
Laboratory capacity is indispensable for foodborne disease surveillance and outbreak investigation. Without the ability to identify causative agents, characterize their molecular fingerprints, and test food and environmental samples for the same agents, it is impossible to confirm outbreaks, trace contamination to its source, detect antibiotic resistance patterns, or monitor trends in pathogen distribution. The laboratory infrastructure needed for effective foodborne disease surveillance encompasses clinical diagnostic laboratories in hospitals and health facilities; regional and national public health reference laboratories capable of confirmatory testing and advanced characterization; food testing laboratories for testing offood samples; and environmental laboratories forwater and environmental sampling.
In many developing countries, each of these laboratory layers has significant capacity gaps. Clinical diagnostic laboratories may lack basic culture media, refrigeration for specimens, trained microbiologists, and functioning autoclave equipment. Public health reference laboratories may lack molecular typing capacity (pulsed-field gel electrophoresis, whole genome sequencing) that is standard in developed countries and essential for epidemiological linkage of outbreak cases. Food testing laboratories may lack equipment for multi-residue pesticide analysis, mycotoxin measurement, or detection of emerging chemical contaminants. Laboratory quality management systems (QMS) and external quality assurance programs — essential for producing reliable, internationally recognized test results — are frequently absent.
The WHO's Global Foodborne Infections Network (GFN) and the International Food Safety Authorities Network (INFOSAN) provide important platforms for laboratory capacity building, training, and data sharing in developing countries. WHO's Laboratory Quality Stepwise Implementation (LQSI) tool and the Africa CDC's Laboratory Systems Strengthening program provide structured frameworks for progressive laboratory quality improvement. Bilateral and multilateral technical assistance programs — particularly from CDC, USAID, the European CDC, and the Gates Foundation — have supported laboratory infrastructure investment and training in many developing countries.
9.3 Outbreak Investigation: Principles and Practice
When cases of foodborne illness begin to cluster — in time, place, or person — a rapid and systematic investigation is needed to confirm that an outbreak is occurring, identify its source and transmission pathway, and implement control measures to prevent further cases. The classic steps of outbreak investigation provide a well-established framework: verify the diagnosis and confirm the outbreak; define a case and systematically find cases; describe the distribution of cases by person, place, and time; generate hypotheses about the source and transmission pathway; test hypotheses using epidemiological studies (cohort or case-control studies); conduct environmental and food safety investigations to identify the implicated food or vehicle; implement and evaluate control measures; and communicate findings to public health authorities, affected communities, and the public.
The capacity to conduct timely, effective outbreak investigations in developing countries is constrained by the same capacity limitations that affect surveillance more broadly: insufficient trained field epidemiologists, limited laboratory support, fragmented institutional arrangements that slow inter-agency coordination, and transportation and communication challenges in reaching outbreak sites in remote areas. The Field Epidemiology Training Program (FETP) model — a two-year, competency-based training program that combines classroom learning with supervised practical outbreak investigation — has been implemented in over 70 countries and has significantly strengthened outbreak investigation capacity globally.
Cluster detection — the statistical identification of unusually high concentrations of cases in time or space — is an important complement to clinical case reporting, particularly for foodborne illnesses that have mild presentations and low healthcare-seeking rates. Syndromic surveillance systems that monitor emergency department visits, pharmacy sales, school absenteeism, and social media mentions for indicators of unusual gastrointestinal illness can provide early warning of outbreaks before laboratory-confirmed cases are reported. These approaches are being piloted in several developing countries, leveraging mobile phone data, e-health records, and social media analytics.
9.4 One Health Surveillance Integration
The majority of foodborne pathogens are zoonotic in origin, cycling between animals, the environment, and humans through food and direct contact pathways. Effective surveillance for zoonotic foodborne diseases therefore requires integrated surveillance across the human health, animal health, and food sectors — a One Health approach that treats the three sectors as a unified system rather than addressing each in isolation. Integrated surveillance enables source attribution — the identification of the relative contributions of different animal reservoirs and food vehicles to human foodborne disease burden —which is essential for prioritizing and targeting food safety interventions.
The WHO-FAO-WOAH Tripartite collaboration has developed a joint risk assessment framework and strongly promotes country-level implementation of integrated surveillance systems for zoonotic diseases. The Codex Alimentarius Code of Practice to Minimize and Contain Antimicrobial Resistance (CXC 61-2005) calls for integrated surveillance of antimicrobial use and resistance in food animals, food products, and humans as a critical component of antimicrobial resistance management — an area of growing food safety concern.
Chapter 10: Consumer Education, Behavior Change, and Food Safety Communication
Safe food requires safe behavior at every point in the food chain — from the farmer who applies the last pesticide spray to the cook who reheats last night's leftovers. This chapter examines the evidence on consumer food safety behavior, the determinants of food handling practices, and the most effective approaches to behavior change communication in developing country contexts.
10.1 Understanding Consumer Food Safety Behavior
Behavior is the proximate determinant of food safety in domestic settings, and improper food handling practices in the home and in food service environments consistently emerge as major contributing factors in foodborne disease outbreaks. Cross-contamination between raw and cooked foods, inadequate cooking temperatures, improper storage, failure to refrigerate perishables, hand hygiene failures, and use of contaminated water in food preparation are among the most commonly identified behaviors contributing to foodborne illness. Surveys of food handling practices in developing countries typically find that a significant proportion of households — often 30 to 50 percent — regularly engage in one or more high-risk behaviors.
However, the relationship between food safety knowledge and food safety behavior is weak and complicated. Studies consistently find that people know the food safety rules — wash hands, cook thoroughly, refrigerate leftovers — but do not consistently apply this knowledge in practice. The gap between food safety knowledge and food safety behavior reflects the powerful influence of habit, convenience, time pressure, cognitive load, and social norms on practical behavior. In the time-pressed reality of preparing a meal for a large family at the end of a long working day, food safety considerations compete with many other priorities and often lose.
Sociocultural factors further complicate the picture in developing country contexts. Traditional food preparation methods, cultural beliefs about 'safe' food that do not correspond to microbiological safety, social norms around hospitality and food sharing, and gender roles in food preparation all influence food handling behavior in ways that simple knowledge provision cannot address. Understanding and working with these cultural factors — rather than dismissing them as mere ignorance to be corrected — is essential for effective food safety behavior change.
10.2 The WHO Five Keys to Safer Food
The WHO Five Keys to Safer Food framework, launched in 2001, provides a simple, memorable, and evidence-based framework for consumer food safety communication that has been adapted and implemented in over 100 countries. The Five Keys are: Keep Clean; Separate Raw and Cooked; Cook Thoroughly; Keep Food at Safe Temperatures; and Use Safe Water and Raw Materials. Each key covers a cluster of specific recommended behaviors, expressed in language accessible to non-experts, and illustrated with culturally adaptable visual materials.
The Five Keys framework has been remarkably successful in establishing a common language and reference point for food safety communication globally, and in providing a practical tool that extension workers, health educators, school teachers, and community food safety promoters can use without specialized expertise. National adaptations of the Five Keys materials in hundreds of languages have been produced and distributed, and the framework has been incorporated into school curricula, food handler training programs, and community health worker programs in many developing countries.
At the same time, evidence on the effectiveness of the Five Keys and similar mass communication campaigns in actually changing food handling behavior is mixed. Studies have consistently found that well-designed campaigns can increase food safety knowledge and awareness, but sustained changes in actual food handling behavior typically require more intensive, individualized, and contextually embedded interventions than mass communication alone can provide. Behavior change communication must address not just knowledge but motivation, self-efficacy, and the practical barriers to safe food handling — including access to clean water, refrigeration, and cooking fuel.
10.3 Effective Approaches to Food Safety Communication
Research on behavior change in public health broadly identifies several principles that apply to food safety communication: the importance of addressing the specific determinants of behavior change (not just knowledge, but motivation, social norms, and practical enablers); the value of direct experience and skills practice over passive information provision; the role of trusted messengers — health workers, community leaders, religious figures, peers — in conveying food safety messages; and the need for sustained, reinforcing communication rather than one-time campaigns.
Community-based food safety promotion programs — training community health workers, women's groups, school children, and religious leaders as food safety champions — have shown stronger and more sustained behavior change outcomes than mass media campaigns alone in a number of developing country evaluations. The integration of food safety messages into existing community health and agricultural extension programs, rather than establishing separate food safety programs, can improve reach and sustainability.
School-based food safety education represents a particularly valuable investment because it reaches children at an age when food safety habits are still being formed, and generates knowledge multiplier effects through children sharing food safety messages with their families and communities. Programs that combine classroom learning with practical skills — demonstrating proper hand washing technique, having students prepare food safely under supervision, and conducting hygiene audits of school kitchens — are more effective than purely didactic approaches. Several developing countries have incorporated food safety education into primary school curricula with demonstrated effects on student knowledge, attitudes, and practices.
10.4 Food Labeling as a Consumer Safety Tool
Food labels convey safety-relevant information to consumers: storage instructions, use-by dates, allergen declarations, cooking instructions, and nutritional information. The value of labeling as a food safety tool depends critically on the extent to which consumers can read and understand labels, the accuracy and completeness of label information, and the enforcement of labeling requirements. In developing countries, all three of these conditions are frequently compromised: high rates of functional illiteracy in some populations limit the reach of text-based labels; label language may not match the consumer's language; mandatory labeling requirements may not cover all relevant safety information; and enforcement of labeling requirements is often inadequate.
The proliferation of unlabeled and improperly labeled food in informal markets in developing countries is a significant food safety problem. Without accurate use-by dates, consumers cannot make informed decisions about the safety of products they purchase; without allergen information, food-allergic consumers face unnecessary risks; and without cooking instructions, consumers may not know that certain products require thorough cooking to be safe. Extending mandatory labeling requirements to cover informal market products, in accessible languages and formats, is an important but challenging regulatory priority.
Chapter 11: Regional Food Safety Landscapes — Challenges and Progress
Food safety challenges, food systems, and policy responses vary significantly across the developing world. This chapter provides region-specific overviews and analysis for sub-Saharan Africa, South Asia, Southeast Asia, Latin America and the Caribbean, and the Middle East and North Africa.
11.1 Sub-SaharanAfrica
Sub-Saharan Africa faces the highest per-capita burden of foodborne disease in the world. Non- typhoidal Salmonella, Campylobacter, Vibrio cholerae, Shigella, and various diarrheal pathogens dominate the biological hazard profile, while aflatoxin contamination of maize and groundnuts represents the region's most significant chronic chemical food safety challenge. The food safety landscape is shaped by several overriding contextual factors: high and persistent poverty; rapid urbanization creating large, dense, informal food sector markets; severe cold chain and sanitation infrastructure deficits; fragmented and under-resourced regulatory systems; and a heavy dependence on smallholder agriculture for food supply.
The informal food sector is dominant across the region, with street food providing a substantial share of daily caloric intake for urban populations in cities from Dakar to Nairobi to Lagos. The food safety conditions in these markets are highly variable, with significant risks arising from temperature abuse, inadequate hygiene infrastructure, and use of contaminated water. At the same time, research in several countries has shown that the food safety performance of street food vendors can be significantly improved through targeted training, infrastructure provision, and supportive regulation.
At the policy level, the African Union's African Model Law on Food Safety provides a framework for regional harmonization of food safety legislation, and the Comprehensive Africa Agriculture Development Programme (CAADP) has made food safety a recognized component of agricultural development strategy. The East African Community (EAC), the Economic Community of West African States (ECOWAS), and the Southern African Development Community (SADC) have all developed regional food safety harmonization frameworks, though implementation has been uneven. Investment in food safety is growing, supported by the African Development Bank, World Bank, USAID, DFID/FCDO, Gates Foundation, and bilateral donors.
11.2 South Asia
South Asia is home to over 1.9 billion people and encompasses food systems of extraordinary diversity and complexity — from subsistence smallholder farming in the Himalayan highlands to export-oriented commercial agriculture in the Punjab, from traditional fermented dairy production in rural Bangladesh to large-scale food processing industries in India's major cities. Food safety challenges in the region are correspondingly diverse, but several themes are prominent across the subregion: high rates of food adulteration in commodity foods; mycotoxin contamination of cereals and spices; pesticide residue violations in horticultural products; heavy metal contamination of rice and vegetables in some areas; and the persistent food safety risks of the dominant informal food sector.
India has undertaken the most significant food safety institutional reform in the region, establishing the Food Safety and Standards Authority of India (FSSAI) in 2008 under the Food Safety and Standards Act to replace a fragmented system of nine overlapping food laws administered by multiple agencies. FSSAI has developed comprehensive food safety standards aligned with Codex, invested substantially in food testing laboratory infrastructure (NABL accreditation of state food testing laboratories), launched major consumer awareness campaigns ('Eat Right India'), and implemented a digital compliance platform. While implementation challenges remain — particularly in reaching the vast informal food sector and ensuring consistent enforcement across India's 28 states — FSSAI's reform represents a significant model forfood safety institutional development in the region.
Food adulteration is a particularly prominent food safety concern in South Asia, with surveys repeatedly documenting adulteration in milk, spices, cooking oils, and many processed foods at rates that suggest a structural rather than occasional problem. Consumer organizations, investigative journalism, and civil society campaigns have been important drivers of regulatory attention to adulteration, and high-profile prosecution of adulterators has served as both a deterrent and a public awareness tool. However, the fundamental drivers of adulteration — the economic incentives to cut costs in highly competitive commodity food markets, combined with low probability of detection — will require sustained regulatory and market structural responses.
11.3 Southeast Asia
Southeast Asia is one of the world's most dynamic food production and export regions. The region is a global center of aquaculture (shrimp, tilapia, pangasius, seaweed), tropical fruit production, spice cultivation, palm oil production, and processed food manufacturing. This export orientation has driven significant investment in food safety systems in several countries — Thailand, Vietnam, Indonesia, and Malaysia in particular— motivated by the requirements of export markets in the EU, United States, Japan, and China. The gap between the food safety standards of export-oriented sectors and those of domestic food supply chains is, however, large and growing.
Rapid economic growth and urbanization are transforming food systems across Southeast Asia, with significant food safety implications. Dietary transitions toward more processed foods, more animal-source foods, and more eating out of home are creating new food safety risks and demanding new regulatory responses. Emerging food safety issues in the region include antimicrobial resistance in aquaculture, pesticide residues in horticultural exports, illegal veterinary drug use in livestock production, and the food safety implications of the rapid proliferation offood delivery services and newfood distribution channels.
ASEAN food safety cooperation has progressed significantly, with the ASEAN Food Safety Policy providing a framework for regional harmonization, mutual recognition of food safety standards, and joint capacity building. The ASEAN Expert Group on Food Safety (AEGFS) coordinates technical cooperation among member states. However, within ASEAN there are large capacity disparities between middle-income members (Thailand, Malaysia, Singapore) and lower-income members (Cambodia, Laos, Myanmar, Timor-Leste), which complicate the development of harmonized regional approaches.
11.4 Latin America and the Caribbean
Latin America has made significant food safety advances over the past three decades, driven by the region's substantial engagement in international agricultural trade, the development of regional economic integration frameworks (Mercosur, the Andean Community, CACM), and active technical assistance from PAHO, FAO, IICA, and the Inter-American Development Bank. Several Latin American countries — Chile, Brazil, Uruguay, Colombia, Mexico, Peru — have developed sophisticated food safety regulatory frameworks and have achieved meaningful export market access for a wide range of agricultural products.
Nevertheless, significant food safety challenges persist throughout the region. Pesticide residue exceedances are a recurring issue in horticultural exports, reflecting both the high levels of pesticide use in commercial agriculture and the stringency of EU MRLs relative to Codex standards. Mycotoxin contamination of maize is endemic in Central America and the Caribbean, with aflatoxin and fumonisin contamination of the maize-based staple diet of poor rural populations a significant chronic health concern. Chagas disease (Trypanosoma cruzi), transmitted in part through contaminated food, is a neglected tropical disease with significant burden in rural Latin America.
In the Caribbean, small island developing states face unique food safety challenges: high dependence on food imports (creating vulnerability to food safety failures in exporting countries), limited regulatory capacity, small domestic markets that cannot support full food safety laboratory and inspection infrastructure, and high exposure to climate hazards including hurricanes and flooding that can disrupt food safety infrastructure. Regional approaches — shared laboratory facilities, pooled regulatory expertise, harmonized import standards — offer more efficient pathways to food safety improvement than each country attempting to build full national capacity independently.
11.5 Middle East and North Africa
The MENA region encompasses a wide range of food safety contexts, from high-income Gulf states with sophisticated food import inspection systems to low-income countries in the Levant and North Africa with significant food production sectors and limited regulatory capacity. The region's heavy dependence on food imports — the MENA region imports more food calories per capita than any other region — means that food import control is a critical food safety function and that exposure to global food safety incidents is high.
Water scarcity is the defining challenge of MENA food systems and has profound food safety implications. Widespread use of treated wastewater for irrigation — common in Jordan, Israel, Saudi Arabia, and other countries — requires careful management to prevent pathogen transmission to fresh produce. Groundwater over-extraction is leading to increased salinity and, in some areas, heavy metal contamination of irrigation water. Climate change is intensifying these water pressures, and food safety planning in the region must increasingly be integrated with water resource management.
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Table 11.1: Regional food safety profiles — leading hazards, regulatory development, and key priorities.
Chapter 12: Illustrative Case Studies in Food Safety Innovation
Case studies from across the developing world illuminate how food safety challenges have been addressed in specific contexts. This chapter presents six detailed case studies offering lessons forpractitioners, policymakers, and researchers.
12.1 Case Study: Aflasafe Biocontrol forAflatoxin Management in West Africa
Aflatoxin contamination of maize and groundnuts in West Africa has long been recognized as a major food safety and public health problem, but effective, affordable, and scalable solutions have been elusive. The development and deployment of Aflasafe — a biocontrol product developed by the International Institute of Tropical Agriculture (IITA) — represents a major breakthrough. Aflasafe uses native non-aflatoxigenic strains of Aspergillus flavus, collected from the specific agroecological zones where it will be deployed, to competitively exclude aflatoxinproducing strains in the field before harvest.
Field trials across Nigeria, Kenya, Senegal, Burkina Faso, Tanzania, and Zambia have consistently demonstrated reductions in aflatoxin contamination of 80 to 99 percent following Aflasafe application. The product is applied to the soil around maize and groundnut plants at the beginning of the flowering period, colonizing the soil and plant debris with non-aflatoxigenic strains that displace the toxigenic strains before the crop is infected. The approach is safe — the non-aflatoxigenic strains are naturally occurring and have been rigorously tested for safety — effective, affordable (approximately USD 5 to 10 per hectare), and compatible with organic and conventional farming systems.
Regulatory registration of Aflasafe has been completed in Nigeria, Kenya, Senegal, and several other African countries, and commercial production has been established in Nigeria and Kenya. The scale-up challenge now is awareness and adoption: many farmers are unaware of the product, distribution networks in rural areas are limited, and the concept of biological control is unfamiliar to many extension workers. Public-private partnerships, government subsidy programs, and integration of Aflasafe into commodity value chain development programs are all being explored as pathways to scale.
12.2 Case Study: Thailand's Shrimp Food Safety System — Building from Crisis
Thailand's shrimp aquaculture sector is one of the world's largest, producing approximately 300,000 metric tons annually for export markets in the EU, United States, Japan, and other high- value markets. Its current status as a globally competitive, food-safety-compliant export sector was achieved through a difficult process of crisis, regulatory failure, and ultimately systematic reform that offers important lessons for other developing country food export sectors.
In the late 1990s and early 2000s, Thai shrimp exports faced repeated rejections and bans by EU and US authorities due to the detection of prohibited antibiotics — particularly chloramphenicol, which is banned due to its association with aplastic anemia — in exported products. The bans threatened a sector earning over USD 2 billion annually in export revenues. The Thai government's response was to invest substantially in the regulatory and technical infrastructure needed to guarantee the safety of its shrimp exports: establishing a comprehensive National Residue Monitoring Program covering a broad range of veterinary drugs and environmental contaminants; developing and enforcing Good Aquaculture Practices (GAP) standards for shrimp farms; investing in ISO-accredited food testing laboratories; implementing a traceability system enabling products to be traced to the farm of origin; and engaging with the EU and US authorities to negotiate return to market access.
The result was a transformed food safety system that has enabled Thai shrimp to maintain access to the world's most demanding markets for over two decades. Key success factors included strong government leadership and investment, active industry cooperation (driven by the economic imperative of export market access), technical assistance from international partners, and the development of a competent national food safety laboratory network. The 'crisis-driven reform' trajectory of Thai shrimp food safety underscores the importance of economic incentives in motivating food safety investment — though ideally, systems should not need to experience export market exclusion before reforms are triggered.
12.3 Case Study: Kenya's Horticulture Export Sector — Inclusive Upgrading
Kenya's horticulture export sector has grown from a small trade in cut flowers in the 1970s to a major export industry earning over USD 1 billion annually, making it one of the world's leading exporters of fresh cut flowers, French beans, snow peas, baby courgettes, and avocados to European markets. The sector's food safety system has been built incrementally over decades through a combination of government regulatory development, private sector investment, and technical assistance from international partners.
A distinctive feature of Kenya's horticulture success is the significant role of smallholder farmers in supply chains. Approximately 50 to 60 percent of horticultural export volumes come from smallholder farms rather than large commercial estates, primarily supplied to export packing houses through outgrower schemes. Including smallholders in export supply chains while maintaining the food safety standards required by European markets — particularly GlobalGAP certification and EU pesticide MRL compliance — has required substantial investment in farmer training, technical support, and supply chain monitoring. The Kenya Horticulture Export Platform and the Sustainable Agriculture Initiative provide coordination mechanisms forthese efforts.
The inclusiveness of Kenya's smallholder-led horticulture model has come under pressure as standards have become more stringent and certification costs have increased. Some packing houses have reduced their dependence on smallholder outgrowers in favor of larger commercial suppliers who can more easily achieve consistent compliance. Managing this tension — maintaining the food safety integrity of export supply chains while preserving the livelihoods of smallholder farmers who depend on horticulture income — is an ongoing challenge for Kenyan food safety policy.
12.4 Case Study: Vietnam's 'Safe Food Market' Initiative
Vietnam's rapidly growing middle class, with increasing awareness of food safety risks and willingness to pay for certified safe food, created the conditions for an innovative market-based food safety initiative in its two largest cities: Hanoi and Ho Chi Minh City. The 'Safe Food Market' (thi truong thuc pham an toan) initiative, developed through collaboration between city authorities, consumer organizations, and food safety agencies, designates selected markets and food service establishments as 'safe food outlets' based on their vendors' compliance with enhanced food safety standards.
Participation in the safe food market program requires vendors to complete food safety training, meet standards for physical hygiene of their vending sites and equipment, submit to regular food safety inspection and testing, and agree to information disclosure about the origin of their produce. Certified vendors receive visible branding (signage, stickers) that signals their safe food status to consumers, and are listed on a publicly accessible online database. Consumer education campaigns inform the public about the safe food market certification, helping drive consumer demand toward certified vendors and creating competitive incentives for non-certified vendors to upgrade.
Evaluations of the program have found significant improvements in food handler knowledge and hygiene practices among participating vendors, increased consumer confidence in the safety of food from certified markets, and positive economic returns to vendors from the premium associated with certification. The program has been replicated in other Vietnamese cities and has been cited as an international model for informal sector food safety improvement. Its success reflects a key principle: working with the informal sector rather than against it, and using market-based incentives rather than punitive enforcement as the primary driver of improvement.
12.5 Case Study: Bangladesh's Formaldehyde-Free Fish Campaign
The illegal use of formaldehyde as a preservative for fish and vegetables in Bangladesh — a practice that emerged in response to cold chain inadequacy and that was widely documented in the early 2000s — presented both a food safety emergency and a regulatory challenge of considerable complexity. Formaldehyde is acutely toxic, classified as a probable human carcinogen by the International Agency for Research on Cancer (IARC), and its presence in food at the levels found in Bangladesh presented a serious public health risk. Yet addressing the practice required confronting structural drivers — cold chain inadequacy, market incentives for extended shelf life — that could not be solved by enforcement alone.
The Government of Bangladesh, with support from international partners, implemented a multicomponent response: intensified inspection and testing offish markets using rapid test kits for formaldehyde detection; prosecution and publicized penalties for vendors found using formaldehyde; consumer education campaigns alerting the public to the risks and encouraging them to demand formaldehyde-free fish; investment in ice production and cold chain facilities in major fish markets; and engagement with the fishing industry to develop and promote safe alternatives to formaldehyde for fish preservation.
The campaign achieved a substantial reduction in formaldehyde use in the formal fish market sector, though monitoring data suggest that the practice persists to some degree in informal channels. The episode illustrates both the complexity of addressing food safety problems that are driven by structural market failures, and the potential of combined regulatory, economic, and communication approaches to achieve measurable improvements in food safety even in resource-constrained settings.
12.6 Case Study: Botswana's Integrated Food Safety System Development
Botswana offers an example of a relatively small, middle-income developing country that has made systematic investments in building a functional food safety system over the past two decades. Starting from a fragmented regulatory base with limited laboratory capacity, Botswana has progressively strengthened its food safety institutions through a combination of national strategic planning, investment in laboratory infrastructure, and active engagement in regional harmonization processes within SADC.
Key elements of Botswana's food safety system development include: the establishment of the Botswana Bureau of Standards (BOBS) as the primary food standards and certification authority; investment in an ISO/IEC 17025-accredited food testing laboratory; development of national food safety legislation aligned with Codex and SADC standards; implementation of a national food surveillance program covering imported and domestically produced foods; and training programs for food safety inspectors and food business operators. The country's relatively small population and concentrated food supply chain (centered on the capital, Gaborone) have made these investments more feasible than in larger, more geographically dispersed countries.
Chapter 13: Antimicrobial Resistance — A Food Safety Frontier
The emergence and global spread of antimicrobial resistance (AMR) represents one of the most serious long-term threats to human health, and the food system is a critical arena in which resistance is selected, amplified, and transmitted. This chapter examines the food-AMR interface, with particular attention to its significance in developing countries.
13.1 The AMR-Food Safety Nexus
Antimicrobial resistance arises when microorganisms — bacteria, viruses, fungi, and parasites — evolve mechanisms that render them resistant to the drugs used to treat the infections they cause. The use of antibiotics in food animal production — including therapeutic use to treat sick animals, metaphylactic use to treat groups of animals when some members are sick, and, in some countries still, sub-therapeutic use as growth promoters — selects for resistant bacteria in livestock and creates a pool of resistant organisms that can reach humans through food, environmental contamination, and direct contact.
Foodborne bacteria that have acquired resistance to clinically important antibiotics present a dual threat: they cause foodborne illness that is more difficult to treat (increasing the severity and duration of illness, and the risk of death), and they can serve as vectors for the transfer of resistance genes to other bacteria in the human gut. The finding of Extended Spectrum BetaLactamase (ESBL)-producing E. coli and Klebsiella — resistant to most beta-lactam antibiotics — in retail meat and fresh produce in multiple developing countries illustrates the direct foodchain pathway for AMR transmission from the agricultural sector to human patients.
In developing countries, the AMR-food safety nexus is particularly concerning for several reasons: antibiotic use in food animal production is often poorly regulated and extensively documented as problematic; veterinary antibiotic products that are restricted or banned in developed countries are often freely available; surveillance of AMR in food animals and food products is limited; and health system capacity to treat severe antibiotic-resistant foodborne infections is often inadequate. The combination of high exposure to antibiotic-resistant organisms through food and limited treatment capacity creates conditions for AMR to cause significant excess mortality.
13.2 Regulatory Approaches to Managing AMR in Food Systems
Managing AMR in food systems requires regulatory interventions across multiple sectors: restricting the use of critically important antibiotics in food animal production; enforcing veterinary prescription requirements for antibiotic use; implementing withdrawal periods between last antibiotic administration and slaughter; monitoring residue compliance in food products; and conducting integrated AMR surveillance across the human, animal, and food sectors. These interventions correspond broadly to the WHO Global Action Plan on Antimicrobial Resistance and the Codex Alimentarius Code of Practice to Minimize and Contain Antimicrobial Resistance.
In many developing countries, veterinary antibiotic regulations are weak or poorly enforced. Antibiotics are freely available over the counter without veterinary prescription in many markets; farmers may use antibiotics incorrectly, at sub-therapeutic doses or without completing courses; and regulatory testing of food products for antibiotic residues is limited. Strengthening the regulatory framework for veterinary antibiotic use — including tighter prescribing requirements, improved product registration, and residue monitoring — is a priority but requires overcoming resistance from the pharmaceutical industry and from farmers who depend on cheap antibiotics for economic livestock production.
13.3 Alternative Approaches to Antibiotic Use Reduction
A sustainable response to AMR in food systems requires not only restrictions on antibiotic use but development and adoption of effective alternatives. Biosecurity improvements that reduce the need for prophylactic antibiotic use — better farm hygiene, all-in-all-out production systems, vaccination, and genetic selection for disease resistance — are the most fundamental alternatives. Competitive exclusion cultures, bacteriophages, probiotics, organic acids, and antimicrobial plant extracts are among the alternatives to antibiotics being developed and tested in food animal production settings, with some showing sufficient efficacy and safety to merit regulatory approval and commercial deployment.
Consumer awareness of the AMR consequences of antibiotic use in food animal production is growing in developed countries and driving market demand for antibiotic-free or raised-without- antibiotics products. Similar consumer demand in developing countries, where middle-class consumers are increasingly food safety conscious, is beginning to create market incentives for antibiotic stewardship in food animal production. Governments can support this market shift through mandatory labeling of antibiotic use in food animal production, public awareness campaigns, and preferential procurement of antibiotic-free products for public institutions including schools and hospitals.
Chapter 14: Policy Solutions and the Path Forward
The knowledge, technologies, and institutional models needed to dramatically improve food safety in developing countries largely exist. The challenge is translating them into sustained, equitable, and effective policy change. This concluding chapter outlines a comprehensive policy agenda and reflects on the commitments needed to achieve it.
14.1 A Strategic Framework for National Food Safety Systems
Building a functional national food safety system is a long-term project requiring sustained political commitment, adequate financial investment, and coherent strategic planning. The World Bank's Enabling Environment for Food Safety (EEFS) framework identifies five essential enabling conditions: a food safety law that is comprehensive, science-based, and enforceable; a competent regulatory authority or authorities with clear mandate, resources, and independence; laboratory networks capable of testing food products and biological specimens to international standards; a surveillance system for foodborne disease that can detect and respond to outbreaks; and mechanisms for consumer engagement and food safety communication.
Countries at different stages of food safety system development need different strategies. Countries with very weak foundational systems need to prioritize basic institution-building: passing modern food safety legislation, establishing a clear regulatory architecture, and making minimum infrastructure investments in laboratory capacity and surveillance. Countries with moderate capacity need to focus on strengthening regulatory effectiveness — improving inspection systems, laboratory quality, and surveillance sensitivity — and on extending the reach of the formal food safety system to cover the informal sector. Countries with relatively strong formal systems need to focus on food safety equity — ensuring that the food safety improvements achieved in export and formal domestic sectors are matched by equivalent improvements in the food consumed by the poorest consumers.
14.2 Risk-Based Prioritization: Making the Most of Limited Resources
Given the severe resource constraints facing food safety authorities in developing countries, systematic prioritization of regulatory resources toward the hazards and activities that pose the greatest actual public health risks is both a scientific imperative and a practical necessity. Riskbased prioritization requires data: epidemiological data on the burden of foodborne disease by pathogen, food category, and population group; dietary exposure data from food consumption surveys; food contamination monitoring data; and information on the effectiveness and cost of available control measures. In most developing countries, this data base is incomplete, requiring adaptation of global evidence to local contexts and use of expert judgment to fill data gaps.
International tools for risk-based prioritization — including WHO's FERG burden estimates, FAO/WHO risk assessments, and the Codex risk analysis framework — provide a foundation, but need to be supplemented with local surveillance data and contextualized for national food systems. Investing in the data systems needed to support evidence-based prioritization — strengthening foodborne disease surveillance, expanding food safety monitoring programs, and conducting periodic dietary exposure assessments — should be recognized as essential components offood safety system infrastructure, not optional technical activities.
14.3 Integrating Food Safety with Food Security and Nutrition
Food safety, food security, and nutrition are deeply interconnected dimensions of the right to food, yet they are too often addressed in separate policy silos by different ministries, agencies, and donor programs. The evidence that foodborne illness is a major driver of undernutrition — particularly in young children — and that malnutrition increases susceptibility to foodborne infection, makes the case for integration compelling. National nutrition plans should include food safety as a component; food fortification programs should be accompanied by rigorous quality control; school feeding programs should be designed and managed with food safety as a core consideration; and food assistance programs in humanitarian settings should maintain food safety standards appropriate to emergency conditions.
The SDG framework provides important institutional support for integrated food safety and nutrition policy. SDG 2 (Zero Hunger) encompasses food security, nutrition, and sustainable agriculture; SDG 3 (Good Health and Well-Being) encompasses communicable disease control including foodborne illness; and SDG 17 (Partnerships for the Goals) calls for strengthened international cooperation for the implementation of all SDGs, including through capacity building and technology transfer. National voluntary reviews of SDG progress provide opportunities to report on food safety alongside nutrition and agriculture outcomes.
14.4 International Cooperation and Development Finance for Food Safety
Food safety is a global public good: foodborne pathogens cross borders through trade and travel; weak food safety systems in exporting countries directly threaten consumers in importing countries; antimicrobial resistance in food animals in one country contributes to the global AMR crisis; and the benefits of food safety innovation spill across national boundaries. This global dimension provides a strong justification for international cooperation and development finance forfood safety capacity strengthening in developing countries.
Official development assistance (ODA) for food safety has increased over the past decade but remains inadequate relative to need. The case for greater investment is compelling: the return on investment in food safety capacity — measured in lives saved, DALYs averted, productivity gains, and increased agricultural export earnings — is high, measurable, and complementary to investments in health, agriculture, and trade. Innovative financing mechanisms, including blended finance facilities that combine public and private capital, food safety-linked social impact bonds, and climate adaptation finance that incorporates food safety as a co-benefit, deserve active exploration.
14.5 Private Sector Leadership and Public-Private Partnership
The food industry — from multinational processors to smallholder farmers — is the primary actor in food production and bears primary responsibility for the safety of the food it produces. Marketbased incentives for food safety — consumer demand for safe food, premium prices in certified markets, reputational consequences of food safety failures, requirements for export market access — are powerful drivers of private sector food safety investment and should be harnessed by public policy rather than displaced by it.
Public-private partnerships (PPPs) for food safety capacity building have demonstrated results in a number of developing country contexts. Industry-funded collective action programs — such as the GLOBALG.A.P. development assistance programs supporting smallholder certification in developing countries, and the food industry contributions to the Codex Trust Fund — leverage private resources for public food safety goods. Partnership frameworks that are transparent, governed by clear accountability mechanisms, and designed to protect the public interest in independent, science-based standards are essential to ensuring that PPPs deliver genuine public health benefits ratherthan serving primarily as regulatory influence strategies.
14.6 The Research Agenda for the Next Decade
Progress on food safety in developing countries depends on a vigorous, relevant, and well- funded research agenda. Key priorities for the next decade include: improving the measurement of foodborne disease burden in developing countries through better surveillance systems, population-based burden studies, and source attribution research; generating high-quality evidence on the effectiveness and cost-effectiveness of food safety interventions across the continuum from primary production to consumption; developing and validating technologies appropriate for resource-limited settings; understanding the behavioral, cultural, and social determinants of food safety practices among producers, processors, vendors, and consumers; and analyzing the political economy of food safety policy — the interests, incentives, and power dynamics that determine why some food safety reforms succeed and others fail.
Building research capacity in developing countries is as important as conducting research on developing country food safety problems. Sustainable food safety improvement requires locally based researchers who understand the contexts they are studying, can engage credibly with policymakers and practitioners, and can build the evidence base iteratively over time. Investment in food science and public health education in developing country universities, in scientific mentorship and exchange programs, and in open-access publishing that makes global food safety research accessible in developing countries — these are investments in the human capital offood safety science that will pay dividends for decades.
A Vision for Food Safety in 2035
By 2035, the ambition is a world in which: no child in a developing country dies from a preventable foodborne disease; every farmer has access to the knowledge and technology to produce safe food; every food business operates within a regulatory framework that supports and incentivizes food safety improvement; every consumer has access to safe, nutritious food and the information to make informed food choices; and every country has a functional, equitable, and science-based food safety system. This vision is ambitious — but achievable. The knowledge, technologies, and institutional models to realize it largely exist today. What is needed is the sustained political will, adequate financing, international solidarity, and commitment to equity that will transform what is known into what is done.
Glossary of Key Terms
Illustrations are not included in the reading sample
References and Further Reading
Foundational International Reports and Frameworks
• World Health Organization (2015). WHO estimates ofthe global burden offoodborne diseases: Foodborne Disease Burden Epidemiology Reference Group 2007-2015. WHO Press, Geneva.
• Food and Agriculture Organization & World Health Organization (2022). Strengthening national food control systems: A practical guide. FAO/WHO, Rome.
• World Bank Group (2019). The Safe Food Imperative: Accelerating Progress in Low- and Middle-Income Countries. International Bank for Reconstruction and Development/The World Bank, Washington DC.
• Codex Alimentarius Commission (2020). General Principles of Food Hygiene (CXC 11969, Amended 2020). FAO/WHO, Rome.
• World Health Organization (2019). Global Action Plan on Food Safety 2022-2030 (Draft). WHO Press, Geneva.
• FAO/WHO (2019). Sustainable food systems: Concept and framework. FAO, Rome.
• World Health Organization (2015). WHO Global Action Plan on Antimicrobial Resistance. WHO Press, Geneva.
• Jaffee, S., Henson, S., Unnevehr, L., Grace, D. & Cassou, E. (2019). The Safe Food Imperative: Accelerating Progress in Low- and Middle-Income Countries. World Bank, Washington DC.
Epidemiology and Burden of Foodborne Disease
• Kirk, M.D., Pires, S.M., Black, R.E., et al. (2015). World Health Organization estimates ofthe global and regional disease burden of22 foodborne bacterial, protozoal, and viral diseases, 2010. PLOS Medicine, 12(12), e1001921.
• Scallan, E., Hoekstra, R.M., Angulo, F.J., etal. (2011). Foodborne illness acquired in the United States — major pathogens. Emerging Infectious Diseases, 17(1), 7-15.
• Hoffmann, S., Batz, M.B. & Morris, J.G. (2012). Annual cost of illness and quality- adjusted life year losses in the United States due to 14 foodborne pathogens. Journal of Food Protection, 75(7), 1292-1302.
• Grace, D. (2015). Food safety in low- and middle-income countries. International Journal of Environmental Research and Public Health, 12(9), 10490-10507.
• Pires, S.M., Fischer-Walker, C.L., Lanata, C.F., et al. (2010). Aetiology-specific estimates ofthe global and regional incidence and mortality of diarrhoeal diseases commonly transmitted through food. PLOS ONE, 5(12), e15833.
Mycotoxins and Chemical Hazards
• Turner, P.C., Sylla, A., Gong, Y.Y., et al. (2005). Reduction in exposure to carcinogenic aflatoxins by postharvest intervention measures in west Africa: a community-based intervention study. The Lancet, 365(9475), 1950-1956.
• Cotty, P.J. & Jaime-Garcia, R. (2007). Influences of climate on aflatoxin producing fungi and aflatoxin contamination. International Journal of Food Microbiology, 119(1-2), 109-115.
• Liu, Y. & Wu, F. (2010). Global burden of aflatoxin-induced hepatocellular carcinoma: Arisk assessment. Environmental Health Perspectives, 118(6), 818-824.
• Benford, D., Leblanc, J.C., Setzer, R.W., et al. (2010). Principles and methods for the risk assessment ofchemicals in food. Environmental Health Perspectives, 118(S1), 14.
Food Safety Policy, Regulation, and Trade
• Unnevehr, L. (2015). Food safety in developing countries: Moving beyond exports. Global Food Security, 4, 24-29.
• Henson, S. & Humphrey, J. (2010). Understanding the complexities of private standards in global agri-food chains as they impact developing countries. Journal of Development Studies, 46(9), 1628-1646.
• Buzby, J.C. (Ed.) (2003). International Trade and Food Safety: Economic Theory and Case Studies. USDA Economic Research Service Agricultural Economic Report No. 828.
• Hobbs, J.E. (2004). Information asymmetry and the role oftraceability systems. Agribusiness, 20(4), 397-415.
Informal Food Sector
• Baye, K., Guyot, J.P. & Mouquet-Rivier, C. (2013). The unresolved role of dietary fiber on fermentation kinetics, mNFU and gut microbiota in Sub-Saharan Africa. Nutrition Research Reviews, 26(2), 1-15.
• Omemu, A.M. & Aderoju, S.T. (2008). Food safety knowledge and practices of street food vendors in the city ofAbeokuta, Nigeria. Food Control, 19(4), 396-402.
• Donkor, E.S., Kayang, B.B., Quaye, J. & Akyeh, M.L. (2009). Application of the WHO keys of saferfood to improve food handling practices offood vendors in a poor resource community in Ghana. International Journal of Environmental Research and Public Health, 6(11), 2833-2842.
Technology and Innovation
• Arduini, F., Cinti, S., Scognamiglio, V., et al. (2016). How cutting-edge technologies impact the translation offood-borne pathogen biosensors into commercial devices. MicrochimicaActa, 184(7), 2063-2083.
• Pitt, J.I. & Hocking, A.D. (2009). Fungi and Food Spoilage (3rd ed.). Springer, New York.
• Aflasafe Kenya (2021). Aflasafe KE01: A biocontrol product for aflatoxin management in maize and groundnuts. IITA, Ibadan.
Antimicrobial Resistance in Food Systems
• Van Boeckel, T.P., Brower, C., Gilbert, M., et al. (2015). Global trends in antimicrobial use in food animals. PNAS, 112(18), 5649-5654.
• WHO (2017). Critically Important Antimicrobials for Human Medicine (5th revision). WHO Press, Geneva.
• Laxminarayan, R., Duse, A., Wattal, C., et al. (2013). Antibiotic resistance — the need for global solutions. The Lancet, 382(9893), 1057-1098.
Appendices
Appendix A: WHO Five Keys to Safer Food — Detailed Guidance
The WHO Five Keys to Safer Food framework provides a universal, evidence-based approach to safe food handling for the general public, food handlers, and food business operators in any setting. Each Key encompasses a cluster of specific recommended behaviors:
1. KEY 1 — KEEP CLEAN: Wash hands thoroughly with soap and water before handling food and frequently during food preparation; after using the toilet; after handling raw meat, poultry, orseafood; and after touching animals ortheir waste. Wash and disinfect all surfaces and equipment used forfood preparation. Keep kitchen areas and food storage away from insects, pests, and other animals. Use clean cloths and change them frequently.
2. KEY 2 — SEPARATE RAW AND COOKED: Separate raw meat, poultry, and seafood from otherfoods including vegetables and prepared foods, in your shopping cart, refrigerator, and during preparation. Use separate cutting boards, knives, and utensils for raw and cooked foods. Store raw foods in sealed containers at the bottom of the refrigerator to prevent drip contamination. Never place cooked food on a surface that has held raw food without thorough cleaning and disinfection.
3. KEY 3 — COOK THOROUGHLY: Cook all foods thoroughly to kill dangerous microorganisms. For meat and poultry, ensure thatjuices run clear, not pink. Bring soups, stews, and casseroles to a rolling boil. Use a food thermometerwhere available: poultry should reach an internal temperature of74°C, ground meat 71°C, and steaks and roasts at least 63°C. Reheat cooked food thoroughly to at least 74°C throughout.
4. KEY 4 — KEEP FOOD AT SAFE TEMPERATURES: Do not leave cooked food at room temperature for more than 2 hours (1 hour in hot weather above 32°C). Refrigerate promptly all cooked and perishable food to below 5°C. Keep hot food piping hot (above 60°C) before serving. Do not thaw frozen food at room temperature — thaw in the refrigerator, under cold running water, or in the microwave. Do not store food indefinitely even in the refrigerator.
5. KEY 5 — USE SAFE WATER AND RAW MATERIALS: Use only safe water, or treat water to make it safe by boiling or disinfection. Select fresh, wholesome food products and check for signs of spoilage before purchase. Choose foods processed for safety such as pasteurized milk. Wash fruits and vegetables, especially if eaten raw, with clean water. Do not use food beyond its expiry date. Peel fruits and vegetables where possible.
Appendix B: International Food Safety Organizations and Resources
Illustrations are not included in the reading sample
Appendix C: Food Safety Resources and Databases
• WHO Global Foodborne Infections Network (GFN): www.who.int/groups/global- foodborne-infections-network
• FAO/WHO INFOSAN Emergency Network: www.who.int/groups/international-food- safety-authorities-network
• Codex Alimentarius Full Standards Database: www.fao.org/fao-who-codexalimentarius
• WHO FERG Burden of Foodborne Disease Database: www.who.int/activities/estimating-the-burden-of-foodborne-diseases
• World Bank Food Safety Resources: www.worldbank.org/en/topic/agriculture/brief/food-safety
• CGIAR Platform for Big Data in Agriculture: www.bigdata.cgiar.org
• FAO GEMS/Food — Global Environmental Monitoring System: www.fao.org/food/food- safety-quality/scientific-advice/gems
• USDA Foreign Agricultural Service — Food Safety and Inspection: www.fas.usda.gov/food-safety
• IITAAflasafe Products and Research: www.aflasafe.com
• IFPRI Food Safety Research Program: www.ifpri.org/topic/food-safety
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- Alfi Sophian (Author), 2026, Food Safety in Developing Countries. Challenges, Innovations, and Policy Solutions, Munich, GRIN Verlag, https://www.grin.com/document/1708696
