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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Firmicutes => Bacilli => Lactobacillales => Streptococcaceae => Streptococcus => Streptococcus ferus (ex Coykendall 1977)
Coykendall 1983. Member of the "Mutans group".
Coykendall 1983. Member of the "Mutans group".
Gram positive, 0.5 μm in diameter, non-motile cocci, grouped in pairs or chains.
Non-hemolytic, 1 mm in diameter, raised, pitting and somewhat adherent colonies.
Growth at 37 °C, better anaerobically. No growth at 45 °C or in 6.5% NaCl.
The final pH in 1% glucose broth is 4.2 to 4.5. Growth on complex media:
Trypticase soy agar with 5% sheep blood.
Slanetz-Bartley agar
Edwards agar
Growth at 37 °C, better anaerobically. No growth at 45 °C or in 6.5% NaCl.
The final pH in 1% glucose broth is 4.2 to 4.5. Growth on complex media:
Trypticase soy agar with 5% sheep blood.
Slanetz-Bartley agar
Edwards agar
First isolated from sugarcane-consuming wild rats (oral cavity). Also isolated from pigs (nasal & oral samples).
Commensal of wild rats. Not reported in humans.
- Bergey’s Manual of Determinative Bacteriology, 9th ed., 1994.
- 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. - Margo Baele, Luc A. Devriese, Marc Vancanneyt, Mario Vaneechoutte, Cindy Snauwaert, Jean Swings & Freddy Haesebrouck:
Emended description of Streptococcus ferus isolated from pigs and rats. Int J Syst Evol Microbiol 53 (2003), 143-146. - A L Coykendall and M L Freedman. Colonization and cariogenicity of Streptococcus ferus in rats. Infect Immun. 1981 April; 32
(1): 80-85.
Mannitol, lactose, trehalose and sorbitol are fermented. Raffinose & ribose negative.
Hippurate, pyrrolidonyl arylamidase, beta-glucuronidase, beta-galactosidase and
hydrolysis of arginine (in API 20 Strep) negative.
Starch hydrolysis positive. Alkaline phosphatase & V-P variable.
Hippurate, pyrrolidonyl arylamidase, beta-glucuronidase, beta-galactosidase and
hydrolysis of arginine (in API 20 Strep) negative.
Starch hydrolysis positive. Alkaline phosphatase & V-P variable.
(c) Costin Stoica
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