| Koch's bacillus | The Gram-positive bacterium that causes tuberculosis. (09 Oct 1997) |
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| Koch's blue bodies | Schizonts of Theileria parva, the causative agent of East Coast fever; found principally within endothelial cells of the spleen and lymph nodes. (05 Mar 2000) |
| Koch's law | To establish the specificity of a pathogenic microorganism, it must be present in all cases of the disease, inoculations of its pure cultures must produce disease in animals, and from these it must be again obtained and be propagated in pure cultures. Synonym: Koch's law. (05 Mar 2000) |
| Koch's node | sinoatrial node |
| Koch's original tuberculin | <protein> A protein extracted from the tuberculosis bacteriumMycobacterium tuberculosis. It is used in tests to determine if aperson has been exposed to the bacteria and is in danger of coming down with the disease. (09 Oct 1997) |
| Koch's phenomenon | The phenomenon of infection immunity; living tubercle bacilli (Mycobacterium tuberculosis) do not cause reinfection when inoculated into tuberculous guinea pigs (i.e., the animals are "immune" to reinfection) even though the original infections continue to develop and eventually cause death of the animals, rise of temperature and increase of the local lesion, in a tuberculous subject, following an injection of tuberculin. (05 Mar 2000) |
| Koch's postulates | To establish the specificity of a pathogenic microorganism, it must be present in all cases of the disease, inoculations of its pure cultures must produce disease in animals, and from these it must be again obtained and be propagated in pure cultures. Synonym: Koch's law. (05 Mar 2000) |
| Koch's triangle | A triangular area of the wall of the right atrium of the heart, that marks the situation of the atrioventricular node. (05 Mar 2000) |
| Koch, Robert | <person> German bacteriologist and Nobel laureate, 1843-1910. See: Koch's bacillus, Koch's blue bodies, Koch's law, Koch's old tuberculin, Koch's phenomenon, Koch's postulates, Koch-Weeks bacillus. (05 Mar 2000) |
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| Koch, Walter | <person> German surgeon, *1880. See: Koch's node, Koch's triangle. (05 Mar 2000) |
| Koch-Weeks bacillus | <bacteria> Bacterium sometimes associated with influenza virus infections, causes pneumonia and meningitis. (18 Nov 1997) |
| Koch's postulates |
Criteria proposed by Koch for proving the pathogenicity of an organism; (1) the suspected causal organism must be constantly associated with the disease; (2) it must be isolated and grown in pure culture; (3) when inoculated into a healthy plant it must reproduce the original disease.
Ãâó: www.pestmanagement.co.uk/lib/glossary/glossary_k.s...
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| Koch's b. |
Mycobacterium tuberculosis.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| Koch's l. |
see under postulate.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| Koch's node |
see nodus atrioventricularis.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| Koch's p. |
if a guinea pig that has been previously infected with tuberculosis organisms is reinjected intracutaneously, the skin over the injected area undergoes necrosis and a superficial ulcer develops; the ulcer heals quickly and infection of regional lymph nodes is retarded. The phenomenon demonstrates development of ability to localize tubercle bacilli, which is the principle underlying tuberculin tests (q.v.). Called also Koch's reaction.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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