Lactobacillus jensenii
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Lactobacillaceae, Genus Lactobacillus, [Group B lactobacilli
(facultatively heterofermentative), Lactobacillus delbrueckii phylogenetic-group],
Lactobacillus jensenii Gasser, Mandel and Rogosa
1970.
Gram-positive rods (0.6-0.8 x 2.0-4.0 µm), occurring singly, and in short chains.
Can grow at 45 ºC, but not at 15 ºC. Folic acid, vitamin B12, nicotinic acid, and calcium
pantothenate are required for growth.
Isolated from human vaginal discharge and blood clot.
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. Rogosa M., 1974. Genus I. Lactobacillus Beijerinck 1901. In: (Eds.) Buchanan R.E. and Gibbons N.E., Bergey’s Manual of
    Determinative Bacteriology, Eighth Edition , The Williams & Wilkins Company, Baltimore, 576-593.
  3. Gasser F., Mandel M. and Rogosa M., 1970. Lactobacillus jensenii sp.nov., a new representative of the subgenus
    Thermobacterium. J. Gen. Microb. 62, 219-222.
Facultatively heterofermentative. Lactobacillus jensenii is  hardly distinguishable from
Lactobacillus delbrueckii subsp. lactis by simple physiological tests.

Positive results for fermentation of: amygdalin, cellobiose, esculin, fructose, galactose,
glucose (without gas production), maltose, mannose, ribose, salicin, sucrose &
trehalose.

Negative results for fermentation of: adonitol, arabinose, gluconate, lactose, melezitose, melibiose, raffinose, rhamnose, sorbitol,
sorbose & xylose.

Variable results for mannitol fermentation.
(c) Costin Stoica
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