Epidemics
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12.1.09
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are caused by germs that spread quickly from person to person
civilization facilitates this
civilization facilitates animal-human contact, too
cause acute illness
die or recover shortly
survivors are immune. disease dies out until a new generation arrives or a mutant organism arises
tend to be restricted to humans (don’t have an environmental reservoir)
measles, rubella, mumps, pertussis, smallpox
environmental reservoirs: influenza in pigs and birds
need large populations to support epidemic nuclear chain reactions
small populations get diseases with non-human reservoirs
Category: Pathology Notes
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