Lactobacillus equi
Taxonomy
Morphology
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Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Lactobacillaceae, Genus Lactobacillus [Group B lactobacilli
(facultatively heterofermentative), Lactobacillus salivarius phylogenetic-group],
Lactobacillus equi  Morotomi, Yuki, Kado, Kushiro,
Shimazaki, Watanabe and Yuyama 2002.
Gram-positive rods (0.6-0.8 x 1.3-3.5 μm) occurring singly and in pairs; some
strains contain filamentous cells. Nonmotile.
Colonies on MRS agar are white, smooth, convex and 2 mm in diameter. No growth at
15 ºC. Variable growth at 45 ºC. Facultatively anaerobic.
Isolated from horse faecal specimens as one of the predominant intestinal lactobacilli.
Undetermined.
  1. Hammes W.P. and Hertel C., 2009. Genus I. Lactobacillus Beijerinck 1901. 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, 465-511.
  2. Morotomi M., Yuki N., Kado Y., Kushiro A., Shimazaki T., Watanabe K. and Yuyama T., 2002. Lactobacillus equi sp. nov., a
    predominant intestinal Lactobacillus species of the horse isolated from faeces of healthy horses. IJSEM 52, 211-214.
Facultatively heterofermentative.

Positive results for fermentation of: fructose, galactose, glucose (D- and L-lactic acid
are produced), lactose, maltose, mannitol, melibiose, raffinose, and sucrose.

Negative results for catalase, fermentation of: amygdalin, adonitol, arabitol, cellobiose, dulcitol, erythritol, fucose, gluconate, glycogen,
glycerol, inositol, melezitose, sorbose, starch, and trehalose.

Variable results for fermentation of: arabinose, esculin, mannose, rhamnose, ribose, salicin, sorbitol, and xylose.
(c) Costin Stoica
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