Unknown.
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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Firmicutes => Bacilli => Lactobacillales => Streptococcaceae => Streptococcus => Streptococcus massiliensis Glazunova et al. 2006.
Lancefield group G.
Lancefield group G.
Gram-positive cocci, 0.3–0.7 um in diameter,non-sporulated, non-motile, grouped in
pairs or short chains.
pairs or short chains.
Colonies on sheep-blood agar are circular, white to greyish, shiny, convex, non-
haemolytic and 1–2 mm in diameter after 48 h at 37 °C in CO2 - enriched atmosphere.
Growth also occurs in aerobic, microaerophilic and anaerobic atmospheres.
Optimum growth temperature is 37 °C but growth is observed at 25 – 37 °C. Growth
occurs in the presence of 2% NaCl.
haemolytic and 1–2 mm in diameter after 48 h at 37 °C in CO2 - enriched atmosphere.
Growth also occurs in aerobic, microaerophilic and anaerobic atmospheres.
Optimum growth temperature is 37 °C but growth is observed at 25 – 37 °C. Growth
occurs in the presence of 2% NaCl.
Isolated from human blood sample. Resistant to optochine.
- Olga O. Glazunova, Didier Raoult and Véronique Roux; Streptococcus massiliensis sp. nov., isolated from a patient blood
culture. IJSEM May 2006 vol. 56 no. 5 1127-1131.
Positive for hippurate hydrolysis, arginine dihydrolase, leucine aminopeptidase, alanyl-
phenylalanylproline arylamidase, glycyl-tryptophan arylamidase alkaline phosphatase,
acid production from maltose.
Negative for catalase, acetoin production, beta-glucosidase, beta-galactosidase, beta-glucuronidase, alpha-galactosidase,
urease, pyrrolidonyl arylamidase, N-acetyl-bglucosaminidase, beta-mannosidase, acid production from: arabinose, mannitol,
sorbitol, lactose, trehalose, inulin, raffinose, glycogen, sucrose, pullulan, tagatose, methyl beta-D-glucopyranoside, melibiose, ribose,
starch & melezitose.
phenylalanylproline arylamidase, glycyl-tryptophan arylamidase alkaline phosphatase,
acid production from maltose.
Negative for catalase, acetoin production, beta-glucosidase, beta-galactosidase, beta-glucuronidase, alpha-galactosidase,
urease, pyrrolidonyl arylamidase, N-acetyl-bglucosaminidase, beta-mannosidase, acid production from: arabinose, mannitol,
sorbitol, lactose, trehalose, inulin, raffinose, glycogen, sucrose, pullulan, tagatose, methyl beta-D-glucopyranoside, melibiose, ribose,
starch & melezitose.
(c) Costin Stoica
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