Koch, Heinrich Herman Robert

(kok) German bacteriologist, 1843–1910.

Koch's bacillus

Mycobacterium tuberculosis.

Koch's phenomenon

A local inflammatory reaction resulting from injection of tuberculin into the skin of a person who has been previously exposed to the tubercle bacillus. The test represents the clinical application of a type IV (delayed-type) hypersensitivity reaction. In contemporary skin tests for tuberculosis, Koch's, or “old, ” tuberculin has been replaced by tuberculin purified protein derivative. See: tuberculosis

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 susceptible animals, pure cultures can reproduce the disease or pathological condition; and the organism can be obtained again in pure culture from the inoculated animal.

单词	koch, heinrich herman robert
释义	DictionarySeeKoch's bacillusSee Koch's Phenomenon See Koch's Phenomenon Koch, Heinrich Herman Robert Koch, Heinrich Herman Robert (kok) German bacteriologist, 1843–1910. Koch's bacillus Mycobacterium tuberculosis. Koch's phenomenon A local inflammatory reaction resulting from injection of tuberculin into the skin of a person who has been previously exposed to the tubercle bacillus. The test represents the clinical application of a type IV (delayed-type) hypersensitivity reaction. In contemporary skin tests for tuberculosis, Koch's, or “old, ” tuberculin has been replaced by tuberculin purified protein derivative. See: tuberculosis 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 susceptible animals, pure cultures can reproduce the disease or pathological condition; and the organism can be obtained again in pure culture from the inoculated animal.
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