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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Firmicutes => Bacilli => Lactobacillales => Streptococcaceae => Streptococcus => Streptococcus sobrinus Coykendall 1983.
Synonym: Streptococcus mutans subsp. sobrinus Coykendall 1974.
Member of the "Mutans group".
Synonym: Streptococcus mutans subsp. sobrinus Coykendall 1974.
Member of the "Mutans group".
Gram positive cocci, 0.5 µm in diameter, arranged in pairs to medium-long chains,
non-motile.
non-motile.
Colonies are non-haemolytic, on agar containing sucrose are about 1 mm in
diameter, rough, and heaped and often have droplets of liquid at the top or the
border.
Facultatively anaerobic, optimal growth at 37.0 °C. Growth at 45 °C is variable, no
growth at 10 °C. Grow on media: Trypticase soy agar with defibrinated sheep blood.
Growth is enhanced in a low oxygen atmosphere.
diameter, rough, and heaped and often have droplets of liquid at the top or the
border.
Facultatively anaerobic, optimal growth at 37.0 °C. Growth at 45 °C is variable, no
growth at 10 °C. Grow on media: Trypticase soy agar with defibrinated sheep blood.
Growth is enhanced in a low oxygen atmosphere.
Human oral cavity inhabitant. Isolated from teeth surface.
Human commensal associated with the development of tooth decay.
- J. G.Holt et al., 1994. Begey’s manual of Determinative Bacteriology, 9th edition, Williams & Wilkins.
- Coykendall A.L.: Streptococcus sobrinus nom. rev. and Streptococcus ferus nom. rev.: habitat of these and other mutans
streptococci. Int. J. Syst. Bacteriol., 1983, 33, 883-885.
Mannitol, lactose, trehalose, sucrose & Voges Proskauer reaction are positive. An adhesive glucan is produced from sucrose.
Hydrogen peroxide is produced.
Ammonia is not produced from arginine. Hydrolysis of hippurate, salicin & melibiose are negative.
Sorbitol, trehalose, inulin, raffinose & esculin hydrolysis are variable.
Hydrogen peroxide is produced.
Ammonia is not produced from arginine. Hydrolysis of hippurate, salicin & melibiose are negative.
Sorbitol, trehalose, inulin, raffinose & esculin hydrolysis are variable.
(c) Costin Stoica
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