Corynebacterium accolens

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Gram stain Culture

General information
- The pathogenic potential of coryneform bacteria has been underestimated
  
  Taxonomy
  Family: Corynebacteriaceae
  
  Natural habitats
  They are part of the normal biota of the skin and mucous membranes in humans and other mammals.
  
  Clinical significance
  C. accolens is found in specimens from the eyes, ears, nose, and oropharynx.
  Evidence confirming the Corynebacterium isolates as the causative agents of these infection is not provided
  
  Endocarditis of native aortic and mitral valves due to this agent has been described.
Gram stain
- Gram positive rods,
  
  irregularly shaped (‘coryneforms”),
  
  they are arranged as single cells, in pairs, in V forms, in palisades, or in clusters with
  
  a so-called Chinese-letter appearance.
  
  Club-shaped rods are observed in true members of the genus Corynebacterium only
Culture characteristics
- Facultative anaerobic
  
  BA: colonies are convex, smooth, and < 0.5 mm in diameter. (lipophyl)
  
  They exhibited satellitism when grown in the presence of staphylococcal colonies, which may be suggestive of their lipophilic nature.
  
  Lipophilic
  bacteria (fat-liking bacteria) are bacteria that proliferate in lipids.
  
  Good growth is observed with broth supplemented with 1% Tween 80
Characteristics
References
- James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition