Neisseria elongata

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Gram stain Culture

General information
- Taxonomy
  Family: Neisseriaceae
  
  3 subspecies
  - N. elongata subsp. elongata
  - N. elongata subsp. gycolytica
  - N. elongata subsp. nitroreducens
  
  Natural habitats
  They colonizes the oral cavity and respiratory tract of humans.
  
  The color of colonies ranges from light grey to buff.
  
  Clinical significance
  This causes diseases in an opportunistic fashion.
  
  They were occasionally recovered as causitive agents of endocarditis.
Gram stain
- Gram negative short rods
  
  of ca. 0.5 µm
  
  frequently arranged as diplobacilli or in chains
  
  While Neisseria species are gram negative, occasionally a tendency to withstand decolorization.
Culture characteristics
- Obligate aerobic
  
  5% CO2 improves the growth
  
  BA: they form grayish white, semiopaque colonies, wich have a diameter up to 3 mm after 48 h of incubation.
  
  McConkey: no growth
  
  BBAØ: no growth
Characteristics
References
- James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition