Germ Theory of Disease
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Discusses the variables of and the contagion of disease from the ancient spirit and demon age through Hippocrates, Jenner, Koch, and Pasteur. Reviews Hippocrates' humoral theory. Points out the cause of diseases as environmental, genetic, or parasitic. Outlines Koch's postulates and describes relationship of germ theory to biogenesis. Explains Redi's classic experiment in the 1600's which disproved the theory of spontaneous generation. Depicts Tyndell's experiment which showed that suspended matter (cysts and spores of microorganisms) exist in the air. Summarizes the variables in method of transfer and incubation periods of contagious diseases. Points out today's emphasis on the importance of an ever-changing host in the germ theory of disease.
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