Koch's postulates can be used to determine the causes of infectious diseases.

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Koch's postulates are a set of guidelines used to determine the causative agent of an infectious disease. They involve isolating the pathogen from a diseased host, growing it in pure culture, introducing it into a healthy host to reproduce the disease, and then re-isolating the pathogen from the newly infected host. If all of these steps can be completed, it provides strong evidence that the identified pathogen is the cause of the disease.

Koch's Postulates Can Be Used to Determine the Causes of Infectious