Colonies are gray-white with an entire border, ﬂat, somewhat glistening, and smooth
and variable in size. They are 1-2 mm in diameter after 24 h of incubation at 35 ºC and
2-4 mm after 48h of incubation. Alpha-haemolysis is produced on sheep blood agar
plates in areas of heavy growth. Grows between 25 and 35 ºC; most strains grow at
Phylum Proteobacteria, Class Betaproteobacteria, Order Neisseriales, Family Neisseriaceae, Genus Neisseria, Neisseria weaveri
Andersen et al. 1993.
Synonyms: CDC group M-5, Neisseria weaveri Holmes et al. 1993 (later heterotypic synonym).
Gram-negative, broad, plump, medium-to-large, straight rods of varying length when
grown on slants and plates, with a tendency to grow in chains or longer rods in broth
cultures. Nonmotile. Not capsulated. Endospores are not produced.
Isolated from human and animal clinical samples.
It is found as normal oral ﬂora in dogs and is associated with human wound infections resulting from dog bites.
- 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.
- Euzeby (J.P.): List of Bacterial Names with Standing in Nomenclature: a folder available on the Internet. Int. J. Syst. Bacteriol., 1997,
47, 590-592. (List of Prokaryotic names with Standing in Nomenclature. http://www.bacterio.net).
- 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 (strong reaction), phenylalanine
deaminase (weak reaction) & oxidase (strong reaction).
Negative results for DN-ase, iodine test (polysaccharide production), nitrate reduction, nitrite reduction, tributyrin hydrolysis, acid
production from: fructose, glucose, lactose, maltose, mannose & sucrose.
(c) Costin Stoica