Streptococcus gordonii Gram staining
Streptococcus gordonii NCTC 3165
colonies on Sheep Blood Agar
Streptococcus gordonii
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Streptococcus, Streptococcus gordonii  Kilian
et al. 1989. Lancefield group H or non-groupable.
Gram-positive cocci, grouped in short chains. Nonmotile. Nonsporing.
Alpha-hemolytic colonies on horse blood agar. Growth temperature 37 ºC. Aerobic,
facultatively anaerobic. May grow better in a CO
2 enriched atmosphere (5%). No
growth at 10 or 45 ºC (admin note). Grow on: Trypticase soy agar with defibrinated
sheep blood, Brain heart infusion agar or broth. Cannot grow in 4% (w/v) NaCl.
Isolated from human oral cavity and pharynge. Report of isolation from patient with
subacute bacterial endocarditis.
Commensal oral bacteria. May be involved in development of dental plaque and caries.
Oral lesions may lead to bacterial endocarditis.
  1. Kilian M., Mikkelsen L. & Henrichsen J.: Taxonomic study of viridans streptococci: description of Streptococcus gordonii sp. nov.
    and emended descriptions of Streptococcus sanguis (White and Niven 1946), Streptococcus oralis (Bridge and Sneath 1982), and
    Streptococcus mitis (Andrewes and Horder 1906). Int. J. Syst. Bacteriol., 1989, 39, 471-484.
  2. Richard J. Lamont, Azza El-Sabaeny, Yoonsuk Park, Guy S. Cook, J. William Costerton & Donald R. Demuth.: Role of the
    Streptococcus gordonii SspB protein in the development of Porphyromonas gingivalis biofilms on streptococcal substrates.
  3. Robert A. Whiley and Jeremy M. Hardie, 2009. Genus I. Streptococcus Rosenbach 1884, 22AL. In: (Eds.) P.D. Vos, G. Garrity, D.
    Jones, N.R. Krieg, W. Ludwig, F.A. Rainey, K.-H. Schleifer, W.B. Whitman. Bergey’s Manual of Systematic Bacteriology, Volume 3:
    The Firmicutes, Springer, 655-711.
Positive results for acid phosphatase, alkaline phosphatase, arginine hydrolysis
(usually negative when using API Biomerieux strips - admin note), alanyl-phenylalanyl-
proline arylamidase, chymotrypsin, esculin hydrolysis, starch hydrolysis (most strains),
leucine aminopeptidase, beta-mannosidase, alpha-D-fucosidase, beta-D-lactosidase,  
alpha-maltosidase, phospho-beta-galactosidase,  valine aminopeptidase,
beta-D-glucosaminidase, N-acetyl-beta-D-glucosaminidase, acid production from:
N-acetylglucosamine, amygdalin, arbutin, cellobiose, esculin, fructose, galactose,
glucose, inulin (most strains), lactose, maltose, mannose, salicin, sucrose, and
trehalose.

Negative results for beta-glucuronidase, hydrolysis of hippurate, urease, Voges-
Proskauer reaction, acid production from: arabinose, arabitol, adonitol, cyclodextrin,
dulcitol, gluconate, glycerol, glycogen, mannitol, D-melezitose, pullulan, rhamnose,
ribose, sorbose, sorbitol, xylose, and xylitol.

Variable results for alpha- and beta-galactosidase, alpha- and beta-glucosidase, acid
production from: D-glucoside, raffinose, melibiose, and tagatose.
(c) Costin Stoica
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