Hygiene of Communicable Diseases; A Handbook for Sanitarians, Medical Officers of the Army and Navy and General Practitioners

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General Books LLC, 2009 - 474 pages
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920. Excerpt: ... tious;"';'cdritagious)" "zymotic," "zymotoxic," "specific," "germ," and some of them "miasmatic." These terras are misleading and confusing. It is better to include them all under the term "communicable." Communicable diseases are those caused by the lower forms of plant life, bacteria, molds, and yeasts, and by protozoan and metazoan animal parasites which are communicated directly or indirectly between man and man, between animal and man, and between animal and animal. These organisms, being dependent on the tissues for food, are parasites; therefore the affections caused by them are parasitic conditions. For purposes of study the etiology of the communicable diseases is divided as follows: 1. Predisposing Conditions; (a) Remote, (b) Immediate. 2. Exciting or Biological Causes; (a) Animal, (b) Vegetable. Predisposing Conditions Remote.--Age. Mortality is greatest in the years of growth and decline, dropping lowest during adolescence and the early years of maturity, and reaching its highest point in children under one year. It decreases rapidly from the second until the fifteenth year, and then gradually increases until the sixth decade, when it again decreases. Some diseases, such as tuberculosis, are common to all ages, but manifest themselves differently according to the age of the subject. In childhood tuberculosis is more likely to appear in the lymphatic or osseous systems or the serous tissues; during maturity and old age the lungs are more apt to be affected. In infancy and childhood a large percentage of morbidity is connected with the development of anatomical structures and the establishment of physiological functions. The influence of hereditary tendencies and disease, congenital defects ignorant and careless mothers, hard work during and aft...

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