| Flexner's bacillus | A bacterium which is one of the aetiologic agents of bacillary dysentery (dysentery, bacillary) and sometimes of infantile gastroenteritis. (12 Dec 1998) |
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| lactic acid bacillus | A member of the genus Lactobacillus. (05 Mar 2000) |
| Friedlander's bacillus | Gram-negative, non-motile, capsulated, gas-producing rods found widely in nature and associated with urinary and respiratory infections in man. (12 Dec 1998) |
| Friedlander's bacillus pneumonia | Pneumonia caused by Klebsiella pneumoniae, the Friedlander bacillus. (05 Mar 2000) |
| leprosy bacillus | A species of gram-positive, aerobic bacteria that causes leprosy in man. Its organisms are generally arranged in clumps, rounded masses, or in groups of bacilli side by side. (12 Dec 1998) |
| Loeffler's bacillus | <bacteria> A species of gram-positive, asporogenous bacteria in which three cultural types are recognised. These types (gravis, intermedius, and mitis) were originally given in accordance with the clinical severity of the cases from which the different strains were most frequently isolated. This species is the causative agent of diphtheria. (12 Dec 1998) |