Prevotella corporis

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Gram stain Culture

General information
- Taxonomy
  Family: Prevotellaceae
  
  Natural habitats
  Belong to the normal flora of the oropharynx, gastrointestinal tract, the genitals and urinary tract.
  
  Clinical significance
  Prevotella species are among the dominating microorganisms of the oral cavity, where they, despite their commensalism, can be involved in nearly all types of oral infections.
  
  Some are important pathogens in bite wounds and infections of the head, mouth, neck and lungs and they are typical polymicrobial infections.
Gram stain
- Gram negative coccobacilli or bacilli,
  
  evenly colored with rounded ends, which often occur in pairs or short chains.
  
  Liquid medium
  the bacteria can be more polymorphic, longer and have vacuoles
Culture characteristics
- Obligate anaerobic
  
  BBAØ: this pigmented group is growing more slowly than the Bacteroides sp and take for the formation of pigment 2 days to 3 weeks, they are often hemolytic.
  
  P. corporis have dry colonies
  
  BBEØ: no growth
  
  KVBAØ: (BA with kanamycin and vancomycin)
  colonies are black
  
  Fluorescentie/woods lamp: brick red (that appears before the brown pigment
  
  Older cultures in which the black pigment has become visible, do not fluoresce.
  
  The fluorescence of Prevotella is also directly in wound fluid or pus visible.
Characteristics
References
- James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition