Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Streptococcus, Streptococcus devriesei
Collins, Lundström, Welinder-Olsson, Hansson, Wattle, Hudson and Falsen 2004.
Member of the "Mutans group".
Gram-positive cocci, occurring singly, in pairs or short chains.
Colonies are surrounded by an alpha-hemolysis zone on blood agar.
Isolated from the teeth of horses.
- Robert A. Whiley and Jeremy M. Hardie, 2009. Genus I. Streptococcus Rosenbach 1884, 22AL. In: (Eds.) P.D. Vos, G. Garrity, D.
Jones, N.R. Krieg, W. Ludwig, F.A. Rainey, K.-H. Schleifer, W.B. Whitman. Bergey’s Manual of Systematic Bacteriology, Volume 3:
The Firmicutes, Springer, 655-711.
Biochemical characters were determined by NVI Streptococci, API 50 CH and API
Rapid ID 32 Strep systems.
Positive results for alanyl-phenylalanine-proline arylamidase, alpha-galactosidase, beta-glucosidase, beta-mannosidase (weak),
Voges–Proskauer reaction, acid production from: amygdalin, D-arabitol, arbutin, cellobiose, esculin, fructose, galactose, beta-
gentiobiose, glucose, gluconate, inulin, lactose, maltose, mannitol, mannose, melibiose, D-raffinose, salicin, sorbitol, sucrose, D-
tagatose & trehalose.
Negative results for alkaline phosphatase, arginine dihydrolase, beta-galactosidase, beta-glucuronidase, glycyl-tryptophan
arylamidase, nitrates reduction, pyroglutamic acid arylamidase, urease, acid production from: adonitol, D- or L-arabinose, 2- or 5-
ketogluconate, erythritol, D- or L-fucose, glycerol, glycogen, inositol, D-lyxose, melezitose, methyl alpha-D-glucoside, methyl alpha-D-
mannoside, methyl beta-xyloside, N-acetylglucoasamine, D-ribose, rhamnose, starch, D-turanose, xylitol, D- or L-xylose.
Variable results for acid production from: dulcitol & L-sorbose.
(c) Costin Stoica