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Koch's Postulates and Infectious Diseases

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Describe how Koch's postulates establish the etiology of many infectious diseases. Explain why Koch's postulates do not apply to all infectious diseases by giving supporting examples.

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This solution discusses Koch's postulates and infectious diseases.

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Mostly Koch was thinking of bacteria, so his postulates really relate more to how bacteria behave. Most of the exceptions are viruses, because they aren't really "alive" and self-sustaining in the same way that bacteria are.

1. The specific organism should be shown to be present in all cases of animals suffering from a specific disease but should not be found in healthy animals.

This is really the big one when it comes to etiology (i.e. where a disease comes from), because basically you're saying that to get sick with this ...

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