| Lactobacillus (Lentilactobacillus) senioris |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Bacillota (Firmicutes), Class Bacilli, Order Lactobacillales, Family Lactobacillaceae, Genus Lactobacillus, Lactobacillus
senioris Oki, Kudo and Watanabe 2012.
Homotypic synonym: Lentilactobacillus senioris (Oki et al. 2012) Zheng et al. 2020.
Species description is based on a single isolate.
senioris Oki, Kudo and Watanabe 2012.
Homotypic synonym: Lentilactobacillus senioris (Oki et al. 2012) Zheng et al. 2020.
Species 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.
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.
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.
- 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. - Zheng J, Wittouck S, Salvetti E, Franz MAP et al., 2020. A taxonomic note on the genus Lactobacillus: Description of 23 novel
genera, emended description of the genus Lactobacillus Beijerinck 1901, and union of Lactobacillaceae and Leuconostocaceae.
Int J Syst Microbiol. 70, 2782-2858. - Zhao Q, Yang S, Bao G, Wang W, Miao L, Wang S, Shen C and Li Y, 2022. Lentilactobacillus laojiaonis sp. nov., isolated from the
mud in a fermentation cellar for the production of Chinese liquor. Int J Syst Evol Microbiol 72; 005349. DOI: 10.1099/ijsem.
0.005349.
Positive results for arginine hydrolysis (NH3), acid and alkaline phosphatase, cystine arylamidase, esterase (C4), esterase lipase
(C8), gelatin hydrolysis, leucine arylamidase, naphthol-AS-BI-phosphohydrolase, trypsin (weak), valine arylamidase, fermentation of:
L-arabinose, fructose, glucose (acid and gas production), gluconate, methyl beta-D-xylopyranoside, methyl alpha-D-glucoside,
N-acetylglucosamine (weak), 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, mannitol, rhamnose, salicin, sorbitol, sorbose, starch, tagatose, xylitol, and L-xylose.
Variable results for fermentation of mannose, maltose, melibiose, melezitose, raffinose, sucrose, and turanose.
(C8), gelatin hydrolysis, leucine arylamidase, naphthol-AS-BI-phosphohydrolase, trypsin (weak), valine arylamidase, fermentation of:
L-arabinose, fructose, glucose (acid and gas production), gluconate, methyl beta-D-xylopyranoside, methyl alpha-D-glucoside,
N-acetylglucosamine (weak), 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, mannitol, rhamnose, salicin, sorbitol, sorbose, starch, tagatose, xylitol, and L-xylose.
Variable results for fermentation of mannose, maltose, melibiose, melezitose, raffinose, sucrose, and turanose.
(c) Costin Stoica
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