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Chromobacterium violaceum


General Characteristics :

  • biochemicals 
    • oxidase positive
    • glucose fermenter
  • habitat : freshwater and soil in tropics and subtropics (Southeastern US)
    • ingestion of contaminated water
    • exposure to broken skin and mucous membranes to contaminated water
  • media
    • colony
    • characteristic violet pigment (violacein)
    • odor
    • presumptive identification based on pigment production and positive oxidase reaction
  • clinical significance
    • wound infections
    • septicemia
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