Lactobacillus intestinalis
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 B lactobacilli
(facultatively heterofermentative), Lactobacillus delbrueckii phylogenetic-group],
Lactobacillus intestinalis (ex Hemme 1974) Fujisawa,
Itoh, Benno and Mitsuoka 1990.
Historical synonyms:  Thermobacterium Group Th4,  Raibaud et al. (1973),
Lactobacillus intestinalis (Hemme, 1974), not validly
published.
Gram-positive rods (0.6-0.8 x 2.0-6.0 µm), occurring singly, in pairs, and in short
chains. Nonmotile. Nonspore-forming.
Colonies on glucose-blood-liver-agar are round, flat, rough, light-brown, 0.7-2.5 mm
in diameter, with erose edges, after 2 days anaerobic incubation at 37 ºC. Grow on
glucose-blood-liver agar, MRS agar, in Briggs liver broth and in MRS broth. Optimum
growth temperature is 37 ºC. Can grow at 45 ºC, but not at 15 ºC. Facultatively
anaerobic.
The habitat is the intestines of mice and rats.
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. Fujisawa T., Itoh K., Benno Y. and Mitsuoka T., 1990. Lactobacillus intestinalis (ex Hemme 1974) sp. nov., norn. rev., isolated from
    the intestines of mice and rats. IJSB vol.40, no. 3, 302-304.
Facultatively heterofermentative.

Positive results for  fermentation of: fructose, galactose, glucose (without gas production), maltose, mannitol, mannose, and sucrose.

Negative results for catalase, esculin hydrolysis, starch hydrolysis, fermentation of: amygdalin, arabinose, esculin, melezitose,
rhamnose, salicin, sorbitol, starch, trehalose, and xylose.

Variable results for fermentation of: cellobiose, lactose, melibiose, raffinose, and ribose.
(c) Costin Stoica
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