Lactobacillus senioris
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Lactobacillaceae, Genus Lactobacillus, Lactobacillus senioris Oki,
Kudo and Watanabe 2012.

Description is based on a single isolate.
Gram-positive rods, 0.7 x 1.0-10.0 µm, occurring singly, in pairs or in short chains.
Nonmotile. Asporogenous.
After anaerobic growth at 37 ºC for 72 h, colonies on MRS agar are circular, 1.0-2.0
mm in diameter and beige with a smooth or rough surface. Facultatively anaerobic.
Can grow at 10 ºC, but not at 45 ºC. Range of pH 4.0-8.5. Weak growth in 5% NaCl; no
growth in 8% NaCl.
Isolated from faeces of a 100-year-old elderly female person in Okinawa Japan.
Undetermined.
  1. Oki K., Kudo Y. and Watanabe K., 2012. Lactobacillus saniviri sp. nov. and Lactobacillus senioris sp. nov., isolated from human
    faeces. IJSEM 62, 601-607.
Positive results for arginine hydrolysis (NH3), fermentation of: L-arabinose, fructose, glucose (acid and gas production), gluconate,
N-acetylglucosamine (weak reaction), ribose, trehalose, and D-xylose.

Negative results for aesculin hydrolysis, catalase, nitrate reduction, fermentation of: adonitol, amygdalin, D-arabinose, D- or
L-arabitol, arbutin, cellobiose, dulcitol, erythritol, fucose, galactose, glycerol, glycogen, beta-gentiobiose, 2- or 5-ketogluconate,
inositol, inulin, lactose, D-lyxose, maltose, mannitol, mannose, melezitose, melibiose, raffinose, rhamnose, salicin, sorbitol, sorbose,
starch, sucrose, tagatose, turanose, xylitol, and L-xylose.
(c) Costin Stoica
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