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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Firmicutes => Bacilli => Lactobacillales => Streptococcaceae => Streptococcus => Streptococcus alactolyticus Farrow et al. 1985
Lancefield group D (G).
Possible synonym: Streptococcus intestinalis Robinson et al. 1988 ( proposed by Vandamme et al. 1999).
Lancefield group D (G).
Possible synonym: Streptococcus intestinalis Robinson et al. 1988 ( proposed by Vandamme et al. 1999).
Gram positive cocci, non-motile, grouped in chains.
Small (1 mm in diameter), alpha-hemolytic, non-pigmented colonies.
Growth at 37 °C (30-45°C). Aerobic, facultatively anaerobic. Growth on complex media:
Trypticase soy agar with defibrinated sheep blood.
Trypticase soy yeast extract medium.
Growth at 37 °C (30-45°C). Aerobic, facultatively anaerobic. Growth on complex media:
Trypticase soy agar with defibrinated sheep blood.
Trypticase soy yeast extract medium.
Isolated from the intestinal tract & feces of birds and pigs.
Unknown (none). Normal inhabitant of the intestine (colon).
- Bergey’s Manual of Determinative Bacteriology, 9th ed., 1994.
- Farrow J.A.E., Kruze J., Phillips B.A., Bramley A.J. & Collins M.D.: Taxonomic studies on Streptococcus bovis and
Streptococcus equinus: description of Streptococcus alactolyticus sp. nov. and Streptococcus saccharolyticus sp. nov. Syst.
Appl. Microbiol., 1984, 5, 467-482. - Vandamme P., Devriese L.A., Haesebrouck F. & Kersters K.: Streptococcus intestinalis Robinson et al. 1988 and
Streptococcus alactolyticus Farrow et al. 1984 are phenotypically indistinguishable. Int. J. Syst. Bacteriol., 1999, 49, 737-741
Fermenting sugars with mainly lactic acid production.
VP, urea, esculin, leucine arylamidase, acidification of D-fructose, D-glucose, maltose,
mannose & saccharose -positive.
ADH, beta-glucuronidase, alkaline phosphatase, beta-galactosidase,
pyrrolidonyl-arylamidase, hippurate hydrolysis, acidification of adonitol, arabitol,
arabinose, dulcitol, erythritol, fucose, methyl-alpha-D-glucoside, gluconate, glycerol,
inositol, inulin, lactose, melezitose, rhamnose, ribose, sorbitol, L-sorbose, tagatose,
xylitol & xylose - negative.
Trehalose acidification - variable
VP, urea, esculin, leucine arylamidase, acidification of D-fructose, D-glucose, maltose,
mannose & saccharose -positive.
ADH, beta-glucuronidase, alkaline phosphatase, beta-galactosidase,
pyrrolidonyl-arylamidase, hippurate hydrolysis, acidification of adonitol, arabitol,
arabinose, dulcitol, erythritol, fucose, methyl-alpha-D-glucoside, gluconate, glycerol,
inositol, inulin, lactose, melezitose, rhamnose, ribose, sorbitol, L-sorbose, tagatose,
xylitol & xylose - negative.
Trehalose acidification - variable
(c) Costin Stoica
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