Rothia dentocariosa

Display:

Gram stain Culture

General information
- Taxonomy
  Family:Micrococcaceae
  
  Natural habitats
  Is a normal in habitant of the mouth and upper respiratory tract.
  
  Clinical significance
  Isolated from dental carries and very rarely cause disease.
  
  The most common infection is endocarditis, in people with underlying heart valve disorder.
Gram stain
- Gram positive pleomorphic rods with branching, filamentous and diphteroid forms.
  
  Agar: mixture of cocci and rods, rarely filaments
  
  Broth: they are going to branch out after an incubation period of some days
Culture characteristics
- Facultative anaerobic
  
  They grow slightly better in 5% CO2.
  
  BA: colonies are typically whitish (or, more rarely, grayish black), raised, and smooth or rough or have a spooked-wheel form, and they are up to 2 mm after 48h.
  
  Both colony forms can occur in the same culture.
  
  McConkey: no growth
  
  BBAØ: growth
Characteristics
References
- James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition