Herbert J. Schattenberg, M.D.; William H. Harris, M.D.
JAMA. 1941;117(24):2069-2070. doi:10.1001/jama.1941.72820500001011.
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Considerable skepticism is extant regarding the pathogenicity of Bacillus violaceus. It has been generally considered as a nonpathogenic saprophyte having a rather ubiquitous distribution. More careful perusal and consideration of the sparse literature pertinent to this subject reveals, however, that much of the doubt is due to failure of recognition of the fact that many distinctive species exist in the group of which Chromobacterium violaceum is the type species. For a comprehensive classification of this group as regards both the cultural and the pathogenic aspect, the reader is referred to the presentation of Ford.1

Woolley2 identified by pathogenicity and by other specific biologic reactions a species of this group producing fulminating fatal infections in the caribao, or water buffalo, which he termed B. violaceus manilae.

In the 2 human cases recorded, one by Black and Shahan3 and the other by Soule,4 the durations of illness were


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