- Introduction to Community Medicine
- Concept of Health
- Positive health
- Well-being
- Spectrum of health
- Determinants of health
- Indicators of health
- Concept of Disease
- Theories of disease causation
- Epidemiological triad
- Natural history of disease
- Iceberg phenomenon of disease
- Concept of Prevention
- Primary prevention
- Primordial prevention
- Secondary prevention
- Tertiary prevention
INTRODUCTION
Community Medicine is that branch of medicine, which deals with the study of provision of preventive, promotive, curative, rehabilitative and evaluative services to the community at large, through an organized comprehensive health care delivery system.
The goal is to identify the health problems and needs of the defined population (community diagnosis) and to provide the comprehensive health care (preventive, promotive, curative and rehabilitative services) in an organized manner followed by the evaluation of the services.
The term Community Medicine is only a new terminology. It is the successor of the terms Hygiene, Preventive Medicine, Social Medicine and Public Heath.
Hygiene
This word is derived from Greek word “Hygiea”, the Goddess of Health. Her desciples were called Hygienists, who practiced Hygiene for health. Hygiea is represented as a beautiful woman, holding in her hand a bowl from which a serpent is drinking. In Geek mythology, the serpent testifies the art of healing, which symbol is retained even today. During ancient days, due to lock of knowledge about disease causation and spread, Hygiene and cleanliness was the only option for the promotion of health and prevention of disease. Hygiene is defined as “the Science of health and embraces all factors contributing to healthful living”. Hygiene continued to be in prominence until further knowledge about disease causation was acquired.
Later when “Germ theory of disease causation” came to light, in 1840, the tern “Public Health” came into general use, directed towards the maintenance and improvement of the health of the people. In 1920, Prof. Winslow defined Public Health as “the science and art of preventing the disease, prolonging life and promoting health and efficiency through organized community efforts, such as control of communicable disease, sanitation, health education, etc. so as to enable every citizen to realize his birth-right of health and longevity”. Thus the importance of preventing the disease was highlighted. The interventions were applied to healthy persons so as to prolong life. Thus the scope was broadened.
The discoveries in microbiology in the turn of 18th century became a turning point in the etiological concept of disease. Possibility of disease prevention first came to focus when James Lind, while traveling in a ship in 1748 conclusively showed that scurvy can be prevented by the use of fresh citrus fruits. Cellen reported that he himself drank milk inuncted with mercury to prevent syphilis. But the major thrust came with the discovery of small-pox vaccine by Edward Jenner. Thus the concept of Preventive medicine was developed as a branch of medicine distinct from public health, based on etiology, applied to ‘healthy’ people for the control of infectious disease in the community.
Preventive Medicine
Leavell and Clark defined Preventive Medicine as “the science and art of preventing the disease, prolonging life and promoting physical and mental health and efficiency”.
Thus the scope of preventive medicine was broadened from the general measures of health promotion (i.e. Hygiene) to specific measures of disease prevention by immunization, including both. Thus the term preventive medicine is regarded as synonymous with public health.
Social Medicine
This term was first used by Jules Gurein, a French Physician in 1848. However, it was during 1911, Alfred Grotjahn of 4Berlin who stressed that social factors play a dominant role in health and disease.
Social medicine is defined as, “the study of man as a social being in his total environment”, (Physical, Biological and social environment). Thus social medicine became an extension of preventive medicine.
Social medicine achieved academic respectability in England, when John Ryle was appointed as first professor of Social Medicine at Oxford University in 1943, and Professor Crew at Edinburgh. This subject consists of the following components.
Social anatomy, Social physiology, Social pathology and Social therapy.
Social Anatomy
Just like human anatomy deals with the structures of the body, so also social anatomy deals with the structure of the society, which consists of total population, their age and sex-wise distribution, socio-economic classification, types of housing, occupation industries, temples, schools, etc. The study of social anatomy gives a back-ground information in understanding health and disease phenomena in the community.
Social Physiology
Just like human physiology deals with the functions of the body, so also social physiology deals with the functions of the society. The various aspects of human physiology and the corresponding aspects of social physiology are as follows.
Human physiology | Social physiology |
|---|---|
Respiration | Air, ventilation, housing, |
Digestion | Nutrition and health |
Excretion | Disposal of refuse, sewage excreta dead-bodies, etc. |
Reproduction | Family welfare services |
Growth | Demography and population dynamics |
Co-ordination | Customs, habits, traditions, beliefs, cultural practices, etc. |
Social Pathology
Just like human pathology deals with the study of abnormal structure of the body organs, so also social pathology deals with the study of defects in the society such as strikes, lock-outs theft, murder, robbery, sexual assault, juvenile delinquency, etc. and just like the extent of pathology is studied by post-mortem studies so also the extent of social pathology in the community is studied by social post-mortem, which consists of morbidity and mortality (disease and death) surveys. Such surveys also help us to understand the social factors responsible for the prevalence of the disease in the community (explained under “Sociology”).
Social Therapy
Just like medical therapy (treatment) consists of administration of drugs, so also social therapy consists of adoption of social and political actions in the community. Social action consists of giving health education to the community, launching Immunization programme improvement of sanitation, etc. so that the people become health conscious, vaccine conscious, latrine conscious, water conscious, etc. Political action consists of implementation of certain legal measures for the health, safety and welfare of the people. Examples for heath legislations are Medical Termination of Pregnancy-Act (MTP-Act); Prevention of food Adulteration Act (PFA-Act); Employees’ State Insurance Act (ESI-Act); Indian Factories Act (IFA), etc.
Community Diagnosis
This consists of identification and quantification of health problems, in terms of morbidity and mortality rates (disease and death rates) and their influencing factors in a community. This helps to prioritise the halth problems and implement control measures. On the other hand, when a diagnosis is made in an individual by the doctor based on signs and symptoms it is called “clinical diagnosis” (Table 1.1)
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Community Medicine and Hospital Medicine
There are two areas of work for the physician viz. community medicine and hospital medicine. The differences are given in Table 1.2.
With the emergence of non-communicable disease such as hypertension, diabetes, cancer, accidents, etc. and due to their multifactorial etiology, the concept of “multifactorial disease causation” came into vogue. So measures like early diagnosis, identification of risk-factors, limiting the development of disability and rehabilitation of handicapped persons were included in the subject. Thus the scope was broadened from Hygiene to preventive and social medicine and now to Community-Medicine. Thus the concept of Community-Medicine came into vogue.
Whatever may be the terminology, the ultimate goal is to prevent the disease, promote the health and to prolong the life of the people. This is based upon the principle that “Prevention is Better than Cure”. Not only prevention is better than cure, but also it is simpler than cure, Safer than cure, Cheaper than cure and Easier than cure. This is an Universal Truth.