Moraxella osloensis

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Gram stain Culture

General information
- Taxonomy
  Family: Moraxellaceae
  
  Natural habitat
  They are common inhabitants of the upper respiratory tract
  
  Clinical significance
  Usually nonpathogenic and rarely infects humans
  
  They have been reported as rare causative pathogen of infections in humans.
Gram stain
- Gram negative plump rods,
  
  1-2 µm,
  
  nearly often square ends,
  
  often very short diplobacilli, occasionally occurring in short chains.
  
  May show variation in size and shape, often with giant forms and filamentous forms, especially in old cultures..
Culture characteristics
- Obligate aerobic
  
  BA: colonies are 1 mm after 24 hours, circular surface, unpigmented, and no corroding in the agar
  
  Non-hemolytic.
  
  Some strains are very mucoid.
  
  McConkey: variable
  
  BBAØ: no growth
Characteristics
References
- James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition