Abstract
Reports of disease in man and animals due to bacteria in the genus Chromobacterium are rare. Moreover, case reports are often confusing because of changes in bacterial taxonomy. Prior to 1956, the pathogenic species of chromobacteria was referred to as Chromobacterium violaceum. Unfortunately, the seventh edition of Bergey's Manual of Determinative Bacteriology [1] reclassified the genus and changed the name of the mammalian pathogen to Chromobacterium janthinum. The next addition of Bergey's Manual, however, will revert to the traditional name of C. violaceum (P. H. A. Sneath, personal communication). The practice of reporting Serratia marcescens as Chromobacterium prodigiosum has created further confusion and is no longer acceptable. The chromobacteria are gram-negative, nonspore-forming microorganisms that produce violet pigment on most standard laboratory media; they are motile by means of polar or peritrichous flagella [2]. These violet chromogens are now divided into several species of psychrophiles which do not grow at 37 C and C. violaceum which does grow at 37 C [3]. Therefore, by definition, all reported mammalian infections with chromobacteria should be considered to be C.
Published Version
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