Moraxella nonliquefaciens

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Gram stain Culture

General information
- Taxonomy
  Family: Moraxellaceae
  
  Natural habitat
  Is a commensal organism of the upper respiratory tract
  
  Clinical significance
  Usually nonpathogenic.
  
  May be involved in chronic bronchitis and upper respiratory disease and it has been found in individuals with endophtalmitis and occasionally in blood in systemic disease.
Gram stain
- Gram negative rods,
  
  showing variation in shape, size and arrangement.
Culture characteristics
- Obligate Aerobic
  
  BA: colonies are somewhat larger than those of M. atlantae, they are smooth, translucent to semi opaque, colonies spread and rarely pit in the agar
  
  Non-hemolytic.
  
  Some strains are very mucoid.
  
  Nonfimbriated variants occur spontaneously in cultures and form noncorroding, nonspreading colonies which are convex and usually larger than their corroding counterparts (often 3.0 mm after 48 h) and have a butyrous consistency.
  
  McConkey: growth, non lactose fermenter
  
  BBAØ: no growth
Characteristics
References
- James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition