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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Firmicutes => Bacilli => Lactobacillales => Streptococcaceae => Streptococcus => Streptococcus oralis Bridge and Sneath 1982.
Member of the "Mitis group".
Member of the "Mitis group".
Gram positive cocci, non-motile, non-spore-forming, arranged in long chains.
Alpha-haemolytic (on horse blood agar) colonies.
Facultatively anaerobic, optimal growth at 37.0 °C. Growth at 10 & 45 °C is variable.
Growth on : trypticase soy agar with defibrinated blood, BHI blood agar.
Facultatively anaerobic, optimal growth at 37.0 °C. Growth at 10 & 45 °C is variable.
Growth on : trypticase soy agar with defibrinated blood, BHI blood agar.
Isolated from human mouth.
Oral opportunistic bacteria, may cause endocarditis.
- Bridge P.D. & Sneath P.H.A.: Streptococcus gallinarum sp. nov. and Streptococcus oralis sp. nov. Int. J. Syst. Bacteriol., 1982, 32,
410-415. - 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), i (Bridge and Sneath 1982), and Streptococcus
mitis (Andrewes and Horder 1906). Int. J. Syst. Bacteriol., 1989, 39, 471-484. - J. A. Jacobs , J. L. N. Stappers & J. P. Sels: Endocarditis due to Streptococcus oralis in a patient with a colon tumour. European
Journal of Clinical Microbiology & Infectious Diseases, Volume 14, Number 6 / June, 1995, 557-558. - J. G.Holt et al., 1994. Begey’s manual of Determinative Bacteriology, 9-edition, Williams & Wilkins.
Acid is produced from lactose
Acid not produced from arabinose, amygdalin, sorbose, rhamnose, mannitol, sorbitol,
ribose, salicin & inulin.
Does not hydrolyze arginine or esculin.
Catalase, VP & beta-Glucuronidase negative
Beta-Galactosidase positive.
Alpha-Galactosidase variable
Acid not produced from arabinose, amygdalin, sorbose, rhamnose, mannitol, sorbitol,
ribose, salicin & inulin.
Does not hydrolyze arginine or esculin.
Catalase, VP & beta-Glucuronidase negative
Beta-Galactosidase positive.
Alpha-Galactosidase variable
(c) Costin Stoica
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