| Koch's bacillus | The Gram-positive bacterium that causes tuberculosis. (09 Oct 1997) |
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| Koch-Weeks bacillus | <bacteria> Bacterium sometimes associated with influenza virus infections, causes pneumonia and meningitis. (18 Nov 1997) |
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| 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) |
| 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, Walter | <person> German surgeon, *1880. See: Koch's node, Koch's triangle. (05 Mar 2000) |
| Abel's bacillus | Klebsiella pneumoniae subsp. Ozaenae See: Klebsiella ozaenae. (05 Mar 2000) |
| abortus bacillus | A species of the genus brucella whose natural hosts are cattle and other bovidae. Other mammals, including man, may be infected. Abortion and placentitis are frequently produced in the pregnant animal. (12 Dec 1998) |
| acne bacillus | A bacteria isolated from normal skin, intestinal contents, wounds, blood, pus, and soft tissue abscesses. It is a common contaminant of clinical specimens, presumably from the skin of patients or attendants. (12 Dec 1998) |
| bacillus | <bacteria> A genus of bacteria of the family Bacillaceae, including large aerobic or facultatively anaerobic, spore forming, rod shaped cells, the great majority of which are gram-positive and motile. The genus is separated into 48 species, of which three are pathogenic or potentially pathogenic and the remainder are saprophytic soil forms. Many organisms historically called Bacillus are now classified in other genera. (18 Nov 1997) |
| Bacillus amyloliquefaciens | A highly amylolytic species of soil bacteria that produces subtilisin. (05 Mar 2000) |