PLSOILIN 140 Study Guide - Claviceps Purpurea, Pneumonic Plague, Human Flea
26 Feb 2013
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Document Summary
Disease: a harmful deviation from the normal structural or functional state of an organism. Infectious diseases are communicable; travel from one plant to another or animal to animal (transmission) Pathogens cause the disease in the appropriate environment. Disease is the result of several factors coming together in a dynamic system (host, From 1900"s to 2000"s infectious diseases that cause death are less of a factor. Re-emerging diseases- diseases that were once an issue but are now making a comeback. 10-20 generations a day (adapt to antibiotics) Germs are microbes but most microbes aren"t germs. Most microbes are transient: they cant grow and reproduce on or in us. A few are resident: they grow and reproduce in our bodies. Most resident microbes are commensal: one party is benefiting. Parasitic: one party takes advantage in the negative manner. Produces an acid which causes tooth decay. Other bacteria grow around secretions of the apocrine glands: underarms and genital areas.
