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Nigeria's free digital learning hub. Videos, lecture notes, practice questions and leaderboards aligned with CCMAS, NBTE, NCCE, WAEC, NECO, IJMB and JAMB curricula.
Environmental Health Science · 300 Level
This is the complete lecture note for EHS 304 FOOD HYGIENE AND SAFETY, prepared for Environmental Health Science students at 300 Level. You can read it online below, open it in the full viewer, or download the PDF for offline study. It pairs with the course's video lectures, so you can read and watch together.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS COURSE CODE: EHS 304 COURSE TITLE : Food Hygiene and Safety COURSE UNIT LOAD (2 Units C: LH 15; PH 45) SERIES LIST 1. Series 1: Fundamentals of Food Hygiene, Safety and the Food Chain. 2. Series 2: Food Premises, Food Handlers and Sanitary Requirements. 3. Series 3: Food Processing, Preservation, Spoilage and Contamination. 4. Series 4: Food Inspection, Quality Control, HACCP and Regulatory Frameworks. 5. Series 5: Food-Borne Illnesses, Risk Foods, Waste Management and Pest Control. Part 1: Conceptual Foundations of Food, Food Hygiene and Food Safety Sub-Parts: • 1.1 Definitions of Food and Related Concepts (food, food hygiene, food safety, food security, wholesome and unwholesome food, food poisoning) • 1.2 Importance and Objectives of Food Hygiene and Safety • 1.3 Overview of Food Contamination and Food-Borne Hazards Part 2: The Food Chain and Food Security Sub-Parts: • 2.1 The Food Chain: Structure and Stages (farm to fork concept, production, handling, transportation, storage, preparation) • 2.2 Food Security: Elements and Public Health Relevance • 2.3 High-Risk Foods and their Public Health Significance Part 3: Classification of Food by Form and Nutrient Content Sub-Parts: • 3.1 Food Groups Based on Nutrient Content (carbohydrates, proteins, fats and oils, beverages, cereals, legumes, seafood and others) • 3.2 Food by State and Processing Level (raw food, cooked food, processed food)
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS • 3.3 Factors Influencing Food Hygiene Standards in Nigeria Introduction Food plays a central role in human survival and wellbeing, yet the journey it takes from the point of production to the point of consumption involves various processes that can either preserve or compromise its safety. Every day, individuals rely on food systems that must operate safely and efficiently to prevent illness and promote public health. This Series provides you with the foundational understanding needed to appreciate why food hygiene and safety matter, especially in environments where lapses can have serious consequences for communities. The aim of this Series is to introduce you to the basic concepts of food, food hygiene, food safety, and the food chain, and to help you develop a clear understanding of how food is classified and how food security contributes to public health. We shall commence this Series by examining the fundamental concepts related to food, food hygiene, and food safety, including their definitions, importance, and common hazards. Next, we will explore the structure of the food chain and consider how food moves through various stages before reaching consumers, while also examining the concept of food security. Finally, we will conclude by studying how food is classified by nutrient content and form, and by considering key factors that influence food hygiene standards within the Nigerian context. Series Learning Outcomes By the end of Series 1, you should be able to: • SLO 1.1: Define key concepts related to food, food hygiene, food safety, food security, and food contamination. • SLO 1.2: Explain the importance and objectives of food hygiene and safety in public health. • SLO 1.3: Describe the structure and sequential stages of the food chain from production to consumption. • SLO 1.4: Analyse the concept of food security and its relevance to population health. • SLO 1.5: Classify foods based on nutrient content, form, and level of processing. • SLO 1.6: Evaluate the factors that influence food hygiene standards within the Nigerian context.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS 1.1 Definitions Of Food And Related Concepts) Food is central to human survival and wellbeing, therefore understanding its meaning and the related concepts is essential for studying food hygiene and safety. In this section, we will explore the basic terms that form the foundation for the rest of the Series. As you read, take a moment to reflect on how these concepts relate to your daily experiences with food and food environments. Definition of food Food refers to any substance, whether processed, semi processed, or raw, that is intended for human consumption. It includes drinks, chewing gum, and any substance that has been used in the manufacture, preparation, or treatment of food. Food provides nutrients that support growth, repair, and energy. When reflecting on the idea of food, consider how different forms of food contribute to your diet and health. What term is used to describe substances taken into the body to sustain life and provide nourishment? Short description: Diagram showing different categories of commonly consumed foods. Figure 1.1: Examples of major food categories
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Definition of food hygiene Food hygiene refers to the conditions and practices that help to maintain the quality of food and prevent contamination. It includes all measures necessary to ensure the safety, wholesomeness, and suitability of food at all stages from production to consumption. Effective food hygiene reduces the risk of food-borne diseases and helps maintain public trust in food systems. Food hygiene is applied from the point of production to the point of _____. Definition of food safety Food safety is the assurance that food will not cause harm to the consumer when prepared or eaten according to its intended use. Food safety focuses on identifying and controlling hazards that may contaminate food, such as biological, chemical, or physical agents. When considering food safety, think about the many steps food undergoes before it reaches consumers and how each step must be protected to avoid harm. What term describes the assurance that food is safe when consumed in its intended manner? Food Safety (The Broad System) Definition: The complete system of managing risks to ensure food does not cause harm to the consumer. It encompasses the entire supply chain. • Focus: Risk management, legal compliance, and scientific standards. • Includes: HACCP (Hazard Analysis and Critical Control Points) plans, allergen labeling, traceability, and chemical/physical hazard prevention. • Goal: To ensure the end product is safe "from farm to fork." Food Hygiene (The Daily Practice) Definition: The specific, practical steps and conditions maintained during the handling, preparation, and storage of food to prevent contamination. • Focus: Cleanliness, sanitation, and personal behavior. • Includes: Handwashing techniques, "clean-as-you-go" practices, proper storage temperatures, and cross-contamination prevention. • Goal: To prevent the growth and spread of bacteria during the cooking and serving process. Box 1.1: Key difference between food hygiene and food safety Short description: A boxed comparison highlighting how hygiene concerns practices, while safety concerns health protection.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Definition of food security Food security exists when all people, at all times, have physical, social, and economic access to sufficient, safe, and nutritious food that meets their dietary needs and food preferences for an active and healthy life. This concept emphasises availability, accessibility, utilisation, and stability. Consider how local and national conditions influence food security, especially in regions where food supply depends on seasonal changes. Food security requires that people have stable access to food that is safe, nutritious, and _____. Definition of wholesome and unwholesome food Wholesome food is food that is sound, clean, free from contaminants, and suitable for consumption. Unwholesome food is food that is contaminated, spoiled, adulterated, or otherwise unsafe for human consumption. Unwholesome food can lead to illness, discomfort, and in some cases severe health complications. What type of food is considered unsafe because it may contain contaminants or harmful substances? Short description: Image showing examples of wholesome and unwholesome foods. Plate 1.1: Wholesome versus unwholesome food examples Definition of food poisoning and food infection Food poisoning is an illness caused by consuming food contaminated with toxins produced by bacteria, chemicals, or other harmful agents. Food infection occurs when live pathogenic microorganisms are ingested and multiply within the body, causing disease. The distinction between the two helps you understand why proper handling and storage are critical. Food infection results from the ingestion of live microorganisms, whereas food poisoning results from ingesting _____ already present in food. Definition of contamination Contamination refers to the presence of harmful substances or microorganisms in food. These may be biological, chemical, or physical in nature. Contamination can occur at any stage of the food chain, therefore preventive measures are essential. The presence of harmful substances in food is referred to as _____.
LA-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Short description: Diagram showing the three major types of food contamination. Figure 1.2: Types of food contamination Pilot questions 1.1 1. Which term refers to any substance consumed for nourishment and health maintenance? 2. What is the name given to the practices that ensure food remains safe and wholesome? 3. Which concept ensures that food will not cause harm when eaten as intended? 4. What term describes food that is safe, clean, and suitable for consumption? 5. What is the difference between food infection and food poisoning? 1.2 Importance And
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