Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Streptococcus, Streptococcus caballi
Milinovich et al. 2008. Do not react with streptococcal group A, B, C, D, F or G antisera.
Gram-positive, nonmotile ovoids, typically occurring in pairs or long chains.
Anaerobic growth for 24 h on sheep blood agar produces flat, shiny, off-white, round,
alpha-hemolytic colonies, 1–2 mm in diameter. Colonies have a tendency to imbed
into sheep blood agar. Facultatively anaerobic.
Grow in the presence of 40% bile and 0.016% potassium tellurite, but not 6.5% NaCl.
Isolated from the rectum of a horse with oligofructose-induced laminitis.
- Milinovich G.J., Burell P.C., Pollitt C.C., Bouvet A. & Trott D.J.: Streptococcus henryi sp. nov. and Streptococcus caballi sp. nov.,
isolated from the hindgut of horses with oligofructose-induced laminitis. Int. J. Syst. Evol. Microbiol., 2008, 58, 262-266.
Positive for aesculin hydrolysis, Voges-Proskauer reaction, alanyl-phenylalanyl-
proline arylamidase, alpha-galactosidase, beta-glucosidase and leucine
aminopeptidase, acid production from: starch, glycogen, inulin, maltose, melibiose,
methyl beta-D-glucopyranoside, pullulan, raffinose, sucrose, and trehalose.
Negative for arginine hydrolysis, hippurate hydrolysis, N-acetyl-beta-glucosaminidase,
catalase, alkaline phosphatase, beta-galactosidase, beta-glucuronidase, glycyl tryptophan arylamidase, beta-mannosidase,
pyrrolidonyl arylamidase, urease, acid production from: D-arabinose, L-arabinose, cyclodextrin, lactose, mannitol, melezitose, ribose,
sorbitol and tagatose.
(c) Costin Stoica