What were the scientific contributions of Robert Koch?

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danya-kraelin eNotes educator| Certified Educator

Robert Koch made many contributions in the field of microbiology. One of his most important contributions was Koch’s postulates. These are four criteria that must be satisfied in order to establish the relationship between a specific microorganism and an infectious disease.

Koch’s postulates

  1. The microbe must be found in all infected organisms but not in healthy ones.
  2. The suspected microbe must be isolated from infected organisms and grown in pure culture.
  3. The cultured microbe must cause the same disease when inoculated into a healthy organism.
  4. The microbe must once again be isolated and cultured. This second pure culture must be identical to the first.

He also identified the pathogens responsible for anthrax, cholera, and tuberculosis. Koch also pioneered many laboratory techniques still used today, such as the use of solid media to obtain pure cultures.

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