Clostridium butyricum

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Gram stain Culture

General information
- Taxonomy
  Family: Clostridiaceae
  
  Natural habitats
  Spores are widely distributed in soil, aquatic habitats, cheese, naturally soured milk, human feces (including healthy infants).
  
  Clinical significance
  Pathogenicity unknown.
  Isolated from blood, urine, lower respiratory tract, pleural cavity, abdomen, wounds, and abscesses.
Gram stain
- Gram positive rods, (Gram negative in old culture),
  
  0.5-1.7 x 2.4-7.6 µm,
  
  with rounded ends, occur singly, in pairs, or in short chains, occasionally as long filaments.
  
  Spores oval / central or subterminal
  Swelling of the cell negative
Culture characteristics
- Obligate anaerobic
  
  BBAØ: colonies are large, 1-6 mm, circular to irregular, raised to convex, translucent, gray-white, shiny or dull, smooth, with a granular or mottled internal structure.
  
  Nonhemolytic.
Characteristics
References
- James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition