Plesiomonas shigelloides

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Gram stain Culture

General information
- Taxonomy
  Family: Enterobacteriaceae
  (Plesiomonas is Greek for neighbors)
  
  Natural habitats
  Is isolated from a wide range of mammals, birds, fish, water-dwelling, reptiles and amphibians.
  
  Clinical significance
  Human P. shigelloides infections are associated with living in or travel to tropical countries and / or a history of seafood consumption; both acute diarrhea and chronic diarrhea episodes of > 2 weeks have been reported.
  
  Most of the infections are self-limited.
Gram stain
- Gram negative rods,
  
  0.3-1.0 x 0.6-6.0 µm
Culture characteristics
- Facultative anaerobic
  
  BA: colonies are about 1.5 mm, gray, shiny, smooth, opaque, center may be slightly elevated and non-hemolytic
  
  McConkey: growth, non lactose fermenter
  
  BBAØ: growth
Characteristics
References
- James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition