اپیدمیولوژی ، Epidemiology (کتاب پزشکی اپیدمی)

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#Epidemiology
#VZhdanov
#publishingHouseMoscow 
1950 / 1960 Russia 
Hard cover 
348 Pages 
in Stock
255 Tomans

THE SUBJECT AND TASKS OF EPIDEMIOLOGY

The Subject of Epidemiology. Epidemiology deals with infectious, or, in a broader sense, communicable diseases of man. These diseases differ essentially from other pathologi-cal conditions affecting human beings in that they are caused by living organisms-bacteria, protozoa, fungi, viruses, helminths and arthropoda which are parasitic on and patho-genic for man. The organisms causing communicable diseases in man are the subject of study by many branches of biolog-ical and medical science (microbiology, virology, helmin-thology and others) however, epidemiology studies certain aspects of the existence of these organisms-for example, why and how certain biological species became the patho-genic agents of human diseases, what peculiar features in mans social life and activities promote the existence of these organisms at the present time. These questions are largely of an ecological nature and therefore epidemiology might be defined as the ecology of the pathogenic organisms of communicable diseases in human society.

This definition, however, by no means exhausts the subject-matter of epidemiology. A communicable disease occurs as a result of the interaction between the pathogen and the human organism under specific environmental conditions. This interaction is the essence of the infectious process studied by many branches of medical science (gener-al pathology, immunology, clinical study of infections, etc.). Some questions in the theory of infection have a direct bearing on epidemiology. For example: what is the route the pathogen takes on entering or leaving the organ.....

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