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Host Parasite interactions in Disease

Host Parasite interactions in Disease - man animals and...

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Host Parasite interactions in Disease: Some definitions are in order: Disease: a deviation from the "normal" healthy state. Mostly thought of in the context of infectious disease but causes can be other than microbial. In this respect Koch was overgeneralizing to say "All disease is caused by microorganisms". There are also: 1. Genetic Diseases: Tay-Sachs, Sickle Cell Disease, Manic-Depressive illness, Cystic Fibrosis. 2. Developmental Diseases: Birth defects 3. Degenerative Diseases: Arthritis, Necrosis and calcification of injuries, Cirrhosis of the Liver etcetera. However, we will concern ourselves here with infectious diseases caused by microorganisms. Bacteria, viruses, protozoa, yeasts, and fungi all cause disease in
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Unformatted text preview: man, animals and plants. Pathology: The study of disease. The prefix path relates in some way to disease: Pathogenicity: This is the ability of an agent to cause a disease. Pathogenesis: Is the manner in which the disease develops Etiology : Is the cause of the disease Infection: Root of this word implies to "dip into" or to "stain" it implies pathogens growing in the body. Focal infections are infections where the etiology is an organism growing and damaging tissue in an area of the body where it is not normally present. Example is E. coli in UTI's...
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