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Koch's postulates


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Named for the German bacteriologist Robert Koch (1843–1910), these criteria confirming that an agent such as a bacterium causes a disease should be attributed in part to Koch's contemporary Friedrich Gustav Jacob Henle (1809–1885). Purists call them the Henle-Koch postulates. The postulates are: The organism must be present in every case and must be isolated, cultured, and identified; it must produce the disease when a pure culture is given to a susceptible animal; and the organism must be recoverable from the animal.

Subjects: Public Health and Epidemiology.


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