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Koch's Postulates
Term | Definition |
---|---|
Koch's 1st Postulate | Pathogen should be found in all sick individuals, but not in any healthy individuals. |
Koch's 2nd Postulate | Pathogen must be isolated and grown in culture. |
Koch's 3rd Postulate | Pathogen must be inoculated into healthy organism AND cause disease. |
Koch's 4th Postulate | Pathogen must be isolated from once-healthy organism, grown in culture, AND found to be identical to the original pathogen. |