Lactobacillus vaginalis
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
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Pathogenicity
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Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Lactobacillaceae, Genus Lactobacillus, [Group C lactobacilli
(obligately heterofermentative),  
Lactobacillus reuteri phylogenetic group], Lactobacillus vaginalis Embley, Faquir, Bossart and Collins
1989.
Gram-positive rods, 0.5-0.8 x 1.5-25.0 µm, occuring singly, in pairs and short chains.
Nonmotile.
Colonies are white to gray, 1-5 mm in diameter, semi-rough, often with raised areas.
Facultatively anaerobic. Can grow at 30-45 ºC; not at 22 or 48 ºC.
Isolated from the vagina of patients suffering from trichomoniasis, and present in human and pig intestines.
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. Embley T.M., Faquir N., Bossart W. and Collins M. D., 1989. Lactobacillus vaginalis sp. nov. from the human vagina. IJSB Vol. 39,
    No. 3, 368-370.
Obligately heterofermentative (hexoses are fermented to lactic acid, acetic acid
(ethanol), and CO
2 via the phosphogluconate pathway; pentoses are  fermented
to lactic acid and acetic acid by the related pentose phosphate pathaway).

Positive results for fermentation of: galactose, glucose (acid), lactose, levulose, maltose, mannose, melibiose, raffinose, and
sucrose.

Negative results for catalase, fermentation of: N-acetylglucosamine, adonitol, arbutin, arabinose, arabitol, cellobiose, dulcitol,
erythritol, fucose, gentiobiose, glycerol, glycogen, inositol, inulin, 2 and 5-ketogluconate, lyxose, mannitol, melezitose, rhamnose,
sorbitol, sorbose, starch, tagatose, trehalose, turanose, xylose, and xylitol.

Variable and weak results for esculin and ribose fermentation.
(c) Costin Stoica
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