Question

1. Explain in detail (not just enumerate) each of Koch’s postulates to determine the etiology of a bacterial disease and provide at least one exception and how this exception is addressed.

Answer 1

Koch postulate in simple words:

Postulate 1: If a pathogen is causing a disease, it is found constantly cause disease. It means if you have find the symptoms of that disease, you can tell that the same pathogen has infected the body.

Postulate 2) Now the pathogen can be isolate from the infected person and it can be cultured outside the body in appropriate media.

Postulate 3: When this cultured pathogen is inoculated in the healthy body then it will show the same symptoms as seen in first case.

Postulate 4: Now the same pathogen can be reisolated form the infected body and when grown in media. When identification is done, then same pathogen is found.

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