Lactobacillus kalixensis
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 A lactobacilli
(obligately homofermentative), Lactobacillus delbrueckii phylogenetic-group],
Lactobacillus kalixensis Roos, Engstrand and Jonsson
2005.
Gram-positive rods (1.0 x 1.5-10 μm) occurring singly, in pairs and in chains.
Nonmotile. Nonspore-forming.
After anaerobic growth at 37 ºC for 48 h, colonies on MRS agar are 2 mm in diameter,
white, smooth and convex. Growth under aerobic conditions is weak.
Can grow at 25-45 ºC, but not at 20 ºC.
Isolated from a biopsy of the healthy human gastric mucosa.
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. Roos S., Engstrand L. and Jonsson H., 2005. Lactobacillus gastricus sp. nov., Lactobacillus antri sp. nov., Lactobacillus
    kalixensis sp. nov. and Lactobacillus ultunensis sp. nov., isolated from human stomach mucosa. IJSEM 55, 77-82.
Obligately homofermentative (hexoses are fermented almost exclusively to lactic acid
by the Embden-Meyerhof pathway; pentoses or gluconate are not fermented).

Positive results for aesculin hydrolysys, fermentation of: amygdalin, arbutin, cellobiose, fructose, galactose, beta-gentiobiose,
glucose (without gas production), lactose, maltose, mannose, melibiose, N-acetylglucosamine, raffinose, salicin, sucrose, starch,
and trehalose.

Negative results for catalase, fermentation of: adonitol, arabinose, arabitol, dulcitol, erythritol, fucose, gluconate, 2-ketogluconate,
5-ketogluconate, glycerol, glycogen, inositol, inulin, lyxose, melezitose, rhamnose, ribose, sorbitol, sorbose, tagatose, turanose,
xylitol, and xylose.

Variable results for mannitol fermentation.
(c) Costin Stoica
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