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Chromobacterium violaceum is a Gram negative facultative anaerobic bacillus, found in soil and stagnant water, that usually has a violet pigmented appearance on agar culture. It is rarely described as a human pathogen, mostly from tropical and subtropical areas.A 53 year-old farmer died with Chromobacterium violaceum septicemia in Laos. A modified oxidase method was used to demonstrate that this violacious organism was oxidase positive. Forensic analysis of the glucose-6-phosphate dehydrogenase genotypes of his family suggest that the deceased patient did not have this possible predisposing condition.C. violaceum infection should be included in the differential diagnosis in patients presenting with community-acquired septicaemia in tropical and subtropical areas. The apparently neglected but simple modified oxidase test may be useful in the oxidase assessment of other violet-pigmented organisms or of those growing on violet coloured agar.

Original publication

DOI

10.1186/1476-0711-8-24

Type

Journal article

Journal

Annals of clinical microbiology and antimicrobials

Publication Date

29/07/2009

Volume

8

Addresses

SFE Medical Project, Luang Namtha, Lao People's Democratic Republic. guentherslesak@web.de

Keywords

Humans, Chromobacterium, Sepsis, Oxidoreductases, Glucosephosphate Dehydrogenase, Bacterial Proteins, Fatal Outcome, Mutation, Middle Aged, Laos, Female, Male