Colonies are small (1.0-1.5 mm in diameter), grayish white with entire edges, and
slightly granular. Non-hemolytic. Grows aerobically at 37 ºC (5% CO
2 enhances
growth).
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Betaproteobacteria, Order Neisseriales, Family Neisseriaceae, Genus Neisseria, Neisseria cinerea
(von Lingelsheim 1906) Murray 1939.

Old synonym:
Micrococcus cinereus von Lingelsheim 1906.
Gram-negative plump cocci, grouped  in pairs or scattered clusters. Non-motile.
Isolated from the nasopharynx of humans and other clinical specimens.
Opportunistic pathogen. Strains of N. cinerea have been isolated from individuals suffering from proctitis, meningitis, septicemia,
pneumonia and conjunctivitis.
  1. Tone Tonjum, 2005. Order IV. Neisseriales ord. nov. In:  Bergey’s Manual of Systematic Bacteriology, Second edition, Vol two, part C
    The Alpha-, Beta-, Delta-, and Epsilonproteobacteria, George M. Garrity (Editor-in-Chief), pp 774-863.
  2. Skerman, V.B.D., McGowan, V., and Sneath, P.H.A. (editors). "Approved lists of bacterial names." Int. J. Syst. Bacteriol. (1980) 30:225-
    420.
  3. Daniel C. Stein, 2006. The Neisseria. In: The Prokaryotes Third Edition, Volume 5: Proteobacteria:Alpha and Beta Subclasses,
    Martin Dworkin (Editor-in-Chief), pp 602–647.
  4. Neisseria cinerea (von Lingelsheim) Murray (ATCC® 14685™) at www.atcc.org.
Positive results for nitrite reduction, gas from nitrite, catalase (weak reaction) & oxidase.

Negative results for DN-ase, beta-galactosidase (ONPG), GGT, iodine test (polysaccharide synthesis from sucrose), nitrate reduction,
tributyrin hydrolysis, acid production from: fructose, glucose, lactose, maltose, mannose & sucrose.
Neisseria cinerea
(c) Costin Stoica
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