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The following 3 entries include the term [Koch's].
Koch's bacillus
noun: a bacillus of the genus Mycobacterium (M. tuberculosis) that causes human tuberculosis
Koch's phenomenon
noun: the response of a tuberculous animal to reinfection with tubercle bacilli marked by necrotic lesions that develop rapidly and heal quickly and caused by hypersensitivity to products of the tubercle bacillus
Koch's postulates
noun plural: a statement of the steps required to establish a microorganism as the cause of a disease: (1) it must be found in all cases of the disease; (2) it must be isolated from the host and grown in pure culture; (3) it must reproduce the original disease when introduced into a susceptible host; (4) it must be found present in the experimental host so infected
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Merriam-Webster unabridged
