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This is the complete lecture note for COM306 Introduction to Occupational Health. 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: COM 306 Course title: Introduction to Occupational Health Course credit load: 1 Unit Series 1: Development and History of Occupational Health • Part 1.1: Defining Occupational Health o Sub Part 1.1.1: What is occupational health? o Sub Part 1.1.2: Goals and scope of occupational health o Sub Part 1.1.3: Occupational health versus occupational safety • Part 1.2: Historical Development of Occupational Health o Sub Part 1.2.1: Pre-industrial and early observations of work-related illness o Sub Part 1.2.2: The Industrial Revolution and the birth of occupational medicine o Sub Part 1.2.3: The growth of international occupational health institutions • Part 1.3: Development of Occupational Health in Nigeria o Sub Part 1.3.1: Colonial era labour and health regulation o Sub Part 1.3.2: Post-independence occupational health structures o Sub Part 1.3.3: Current institutions and the practice of occupational health in Nigeria
la-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Introduction Work is central to human survival and dignity, but the same activities that sustain livelihoods can also expose workers to hazards capable of causing injury, illness, or death. Occupational health is the field of public health concerned with protecting and promoting the wellbeing of people in their working lives, addressing the physical, chemical, biological, and psychosocial conditions that workers encounter. This Series introduces the meaning and scope of occupational health, traces its historical development from early observations of work-related disease to the formal discipline practised today, and examines how occupational health has developed in Nigeria specifically. Understanding this background is essential for appreciating the working environments, health problems, and regulatory frameworks of occupational health more broadly. By tracing this history, learners gain an appreciation of how occupational health practice has been shaped by industrial change, scientific discovery, and policy development, and why continued vigilance remains necessary in modern workplaces. Series Learning Outcomes Upon completing this Series, you should be able to: • SLO 1.1 define occupational health and distinguish it from occupational safety (Linked to Part 1.1), • SLO 1.2 describe the historical development of occupational health internationally, from early observations to the establishment of international institutions (Linked to Part 1.2), and • SLO 1.3 describe the development of occupational health practice and institutions in Nigeria (Linked to Part 1.3). 1.1 Defining Occupational Health
la-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS 1.1.1 What is occupational health? Occupational health is defined by the World Health Organization and the International Labour Organization as the promotion and maintenance of the highest degree of physical, mental, and social wellbeing of workers in all occupations. It is a multidisciplinary field that draws on medicine, toxicology, engineering, psychology, and law to identify, evaluate, and control conditions in the workplace that may cause harm. Occupational health practitioners work to prevent ill health arising from working conditions, to protect workers from risks to their health, and to place and maintain workers in jobs suited to their physical and psychological capabilities. The field is concerned not only with diagnosing and treating illnesses once they occur but, more importantly, with preventing them in the first place through the recognition, evaluation, and control of workplace hazards. Occupational health therefore sits at the intersection of medicine and engineering, requiring practitioners to understand both the biological effects of exposure and the practical means of reducing that exposure in real working environments. Fill in the blank: Occupational health is the promotion and maintenance of the highest degree of physical, mental, and social ________ of workers in all occupations, as defined jointly by the WHO and the ILO. 1.1.2 Goals and scope of occupational health The goals of occupational health are threefold: to protect and promote the health of workers by preventing occupational diseases, accidents, and injuries; to enhance the physical and mental working capacity of workers; and to develop and promote healthy and safe work environments, organisations, and working cultures that support productivity and wellbeing. These goals extend beyond the individual worker to encompass the broader organisation and even national productivity, since a healthy workforce contributes directly to economic development. The scope of occupational health is broad, covering exposure to physical agents such as noise and vibration, chemical agents such as solvents and dusts, biological agents such as infectious pathogens, ergonomic factors such as repetitive movement and poor posture, and psychosocial
la-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS factors such as work stress and harassment. Occupational health programmes typically include pre-employment and periodic medical examinations, workplace hazard surveys, health education, and emergency preparedness. Fill in the blank: The scope of occupational health covers physical, chemical, biological, ergonomic, and ________ factors in the workplace, requiring health examinations, hazard surveys, and health education as part of a comprehensive programme. 1.1.3 Occupational health versus occupational safety Occupational health and occupational safety are closely related but distinct concepts that are often combined under the term occupational health and safety (OHS). Occupational health focuses on preventing and managing illness arising from exposure to workplace hazards over time, such as respiratory disease from dust inhalation or hearing loss from chronic noise exposure. Occupational safety, by contrast, focuses on preventing accidents and injuries that occur suddenly, such as falls, machinery entanglement, or electrical shock. In practice, the two fields overlap considerably and are usually managed together within a single occupational health and safety programme, since many interventions, such as proper machine guarding or adequate ventilation, serve both health and safety objectives simultaneously. Distinguishing the two helps practitioners apply the most appropriate tools: health surveillance and exposure monitoring for occupational health, and risk assessment and engineering controls for occupational safety. Fill in the blank: Occupational health addresses illness from prolonged exposure to hazards, while occupational ________ addresses sudden accidents and injuries; both are usually managed together as occupational health and safety (OHS).
la-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS Figure 1.1: The relationship between occupational health and occupational safety, showing their distinct concerns and shared overlap Pilot questions 1.1 1. Define occupational health according to the WHO and ILO. (Linked to SLO 1.1) 2. State the three main goals of occupational health. (Linked to SLO 1.1) 3. Distinguish between occupational health and occupational safety. (Linked to SLO 1.1) 1.2 Historical Development of Occupational Health 1.2.1 Pre-industrial and early observations of work-related illness Awareness that certain occupations carry specific health risks dates back many centuries. The Greek physician Hippocrates noted lead poisoning among metal workers as early as the fourth century BC. Centuries later, the Swiss physician Paracelsus described illnesses among miners and metal smelters in the sixteenth century, recognising a connection between specific trades and characteristic diseases. The most influential early figure was Bernardino Ramazzini, an Italian
la-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS physician often called the father of occupational medicine, who in 1700 published De Morbis Artificum Diatriba (Diseases of Workers), the first systematic study of occupational diseases across nearly fifty different trades. Ramazzini's most important contribution was methodological: he insisted that physicians should always ask patients what work they did, recognising that occupation was a critical clue to diagnosis. This simple but powerful principle remains a cornerstone of occupational medicine practice today. His work catalogued diseases among miners, painters, potters, and many other tradespeople, laying the intellectual foundation for the systematic study of work-related illness that would expand dramatically during the Industrial Revolution. Fill in the blank: Bernardino Ramazzini, known as the father of occupational medicine, published De Morbis Artificum Diatriba in ________, the first systematic study of diseases among workers across nearly fifty trades. 1.2.2 The Industrial Revolution and the birth of occupational medicine The Industrial Revolution of the eighteenth and nineteenth centuries transformed work on an unprecedented scale, concentrating large numbers of workers, including many children, in factories and mines under conditions that produced severe and widespread occupational disease and injury. Diseases such as black lung among coal miners, phossy jaw among match factory workers exposed to white phosphorus, and mercury poisoning among hatters became common enough to attract public and medical attention. The severity of these conditions prompted the first protective legislation, including the British Factory Acts beginning in 1802, which gradually introduced limits on child labour and basic safety requirements. Alongside legislation, the nineteenth century saw the emergence of occupational medicine as a recognised medical specialty. Physicians such as Charles Turner Thackrah in Britain published detailed studies linking specific trades to specific diseases, while industrial hygiene began to develop as a discipline focused on measuring and controlling workplace exposures. By the early twentieth century, several countries had established factory inspectorates and required medical
la-NET | ONLINE LEARNING VIDEO PLATFORM FOR POST-SECONDARY & HIGHER INSTITUTION STUDENTS examinations for certain hazardous trades, marking the transition from informal observation to systematic occupational health practice. Fill in the blank: The Industrial Revolution produced severe occupational diseases such as black lung and phossy
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