| Koch's p.’s |
a statement of the kind of experimental evidence required to establish the etiologic relationship of a given microorganism to a given disease. The conditions included are (1) the microorganism must be observed in every case of the disease; (2) it must be isolated and grown in pure culture; (3) the pure culture must, when inoculated into a susceptible animal, reproduce the disease; and (4) the microorganism must be observed in, and recovered from, the experimentally diseased animal.
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| Koch's phenomenon (reaction), postulate, tuberculin |
see under phenomenon, postulate, and tuberculin.
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| Koch's r. |
see under phenomenon.
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| Koch's t. |
Old t.
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| Koch's postulate |
The criterion used in proving an organism is the cause of a disease or lesion: the microorganism in question is regularly found in the lesions of the disease; pure cultures can be obtained from it. When inoculated into susceptib
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