Streptococcus thoraltensis
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Streptococcus, Streptococcus thoraltensis  
Devriese et al. 1997.
Non-groupable with Lancefield antisera.
Gram-positive cocci, grouped in short chains. Nonmotile.
Colonies on sheep blood  agar are small, 1 mm in diameter, opaque and produce
alpha-hemolysis. Optimum growth at 37 ºC. Aerobic, facultatively anaerobic. Growth is
enhanced by incubation in a 5% C0
2 -supplemented atmosphere. No growth at 42 ºC.
Media: Trypticase soy agar with 5% sheep blood, Brain heart infusion agar or broth.
Broth culture produces sediment with clear supernatant. No growth in bile-esculin
medium. Growth occurs in the presence of 6.5% NaCl after 2 days incubation.
Isolated from pigs (vaginal fluids & intestine).
Unknown. Strains isolated from diseased or dead pigs, but pathogenicity was no proved.
  1. Devriese LA, et al. Streptococcus hyovaginalis sp. nov. and Streptococcus thoraltensis sp. nov., from the genital tract of sows. Int. J.
    Syst. Bacteriol. 47: 1073-1077, 1997.
  2. 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.
Positive results for arginine dihydrolase, alkaline phosphatase (weak), alanine phenylalanine proline arylamidase, beta-
glucuronidase, beta-glucosidase. leucine arylamidase, Voges–Proskauer reaction, acid production from: L-arabinose, arbutin,
cellobiose, fructose, galactose, beta-gentiobiose, methyl beta-D-glucopyranoside, glucose, N-acetylglucosamine, inulin, lactose,
maltose, mannose, mannitol, ribose, salicin, starch, sucrose & trehalose.

Negative results for N-acetyl-beta-D-glucosaminidase, pyrrolidonyl arylamidase, beta-mannosidase, urease, acid production from:
adonitol, D-arabinose, D- or L-arabitol, cyclodextrin, dulcitol, erythritol, D- or L-fucose, glycerol, glycogen, gluconate, 2- or 5-
ketogluconate, inositol, D-lyxose, methyl alpha-D-mannoside, methyl beta-xyloside, rhamnose, L-sorbose, xylitol & L-xylose.

Variable results for alpha- or beta-galactosidase, alkaline phosphatase, hippurate hydrolysis, acid production from: amygdalin,
methyl alpha-D-glucoside, melibiose, melezitose, raffinose, sorbitol, D-turanose, tagatose & D-xylose.
(c) Costin Stoica
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