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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Firmicutes => Bacilli => Lactobacillales => Streptococcaceae => Streptococcus => Streptococcus australis Willcox et al. 2001
Member of the "Mitis group".
Member of the "Mitis group".
Gram positive cocci, non-motile, non-spore-forming, arranged in short chains.
Alpha-haemolytic, rough, white, 0.5–1.0 mm in diameter colonies.
Facultatively anaerobic, optimal growth at 37.0 °C. Growth at 45 °C is negative.
Growth on : trypticase soy agar with defibrinated sheep blood, BHI medium.
Facultatively anaerobic, optimal growth at 37.0 °C. Growth at 45 °C is negative.
Growth on : trypticase soy agar with defibrinated sheep blood, BHI medium.
Isolated from the saliva of children.
Oral bacteria.
- Willcox M.D.P., Zhu H. & Knox K.W.: Streptococcus australis sp. nov., a novel oral streptococcus. Int. J. Syst. Evol. Microbiol.,
2001, 51, 1277-1281.
Alkaline phosphatase, alanine-phenylalanine-proline arylamidase, glycyl-tryptophan
arylamidase, acid from lactose, pullulan, maltose, sucrose & arginine hydrolysis -
positive.
Beta-glucosidase, beta-glucuronidase, alpha-galactosidase, Voges-Proskauer
reaction, pyroglutamic acid arylamidase, N-acetyl b-glucosaminidase,
beta-mannosidase, urease, acid from ribose, mannitol, sorbitol, trehalose, raffinose,
glycogen, melibiose, melezitose, L-arabinose, D-arabinose, methyl
beta-D-glucopyranoside, tagatose & hippurate hydrolysis - negative
arylamidase, acid from lactose, pullulan, maltose, sucrose & arginine hydrolysis -
positive.
Beta-glucosidase, beta-glucuronidase, alpha-galactosidase, Voges-Proskauer
reaction, pyroglutamic acid arylamidase, N-acetyl b-glucosaminidase,
beta-mannosidase, urease, acid from ribose, mannitol, sorbitol, trehalose, raffinose,
glycogen, melibiose, melezitose, L-arabinose, D-arabinose, methyl
beta-D-glucopyranoside, tagatose & hippurate hydrolysis - negative
(c) Costin Stoica
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