Colonies are usually large (up to 3 mm), grayish white, opaque, dry, wrinkled, and
adherent. Forms opaque, dry, wrinkled, adherent, colonies but this may vary with
some strains. Some strains may produce a yellowish pigment. Haemolysis is a
variable character.
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Betaproteobacteria, Order Neisseriales, Family Neisseriaceae, Genus Neisseria, Neisseria sicca (von
Lingelsheim 1908) Bergey et al. 1923.

Old synonyms: "
Diplococcos pharyngis siccus" von Lingelsheim 1906,
"
Diplococcus siccus" von Lingelsheim 1908.
Gram-negative cocci occuring singly or grouped in pairs or tetrads. Nonmotile. Not
capsulated. Endospores are not produced.
Isolated from the nasopharynx, saliva, and sputum of humans (very common). Susceptible to colistin.
Opportunistic pathogen.
  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. Magnus Unemo (Editor-in-Chief), 2013. Laboratory diagnosis of sexually transmitted infections, including human immunodeficiency
    virus, pp 44-45. World Health Organization, ISBN 978 92 4 150584 0.
  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.
Positive results for carbonic anhydrase, catalase, iodine test (polysaccharide synthesis from sucrose), nitrite reduction (with gas
production), oxidase, acid production from: fructose, glucose, maltose & sucrose.

Negative results for beta-galactosidase (ONPG), DN-ase, gamma-glutamyl transferase, nitrate reduction, tributyrin hydrolysis, acid
production from: lactose & mannose.
Neisseria sicca
(c) Costin Stoica
Antibiogram
Encyclopedia
Culture media
Biochemical tests
Stainings
Images
Movies
Articles
Identification
Software
R E G N U M
PROKARYOTAE
Previous page
Back