Chromobacterium violaceum

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Gram stain Culture

General information
- the following information is not yet verified
  Taxonomy
  Family: Neisseriaceae
  
  Natural habitats
  Inhabits soil and water in tropical and subtropical climates.
  
  Clinical significance
  Causes rarely infections in humans
  
  Localized infections usually arise from contaminated wounds, and septicemia with multiple organ abscesses may follow.
Gram stain
- the following information is not yet verified
  Gram negative rods, with rounded ends, sometimes slighly curved
  
  Often with barred or bipolar staining and lipid inclusions,
  
  0.6-0.9 x 1.5-3.5 µm
  
  they appear singly, occasionally in pairs, elongated forms and short chains.
Culture characteristics
- the following information is not yet verified
  
  Facultative anaerobic
  
  BA: colonies measure 1-2 mm after 24h growth, are round and smooth and may be β-hemolytic.
  
  Most strains produce a violet pigment called violacein.
  
  Violacein is a natural antibiotic with maybe useful for the treatment of colon or other cancers
  
  Smell: almond-like
  
  McConkey: growth
  
  BBAØ: growth
Characteristics
References
- James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition