Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Lactobacillaceae, Genus Lactobacillus [Group B lactobacilli
(facultatively heterofermentative), Lactobacillus salivarius phylogenetic-group], Lactobacillus apodemi Osawa, Fujisawa & Pukall,
Gram-positive rods, 0.5-1.0 x 5-6 µm, occuring singly or in pairs. Nonspore-forming.
After anaerobic growth 48 h at 37 ºC, colonies on MRS agar are 2-3 mm in diameter,
white with opaque border, smooth and convex. Growth on same agar also occurs
under microaerophilic conditions and reduced growth is detected under aerobic
conditions. Optimum growth temperature 25-37 ºC. No growth at 15 ºC. Can grow at
Isolated from faeces of the Japanese large wood mouse, Apodemus speciosus.
- Osawa R., Fujisawa T. and Pukall R., 2006. Lactobacillus apodemi sp. nov., a tannase-producing species isolated from wild
mouse faeces. IJSEM 56, 1693-1696.
Facultatively heterofermentative (hexoses are fermented almost exclusively to lactic
acid by the Embden-Meyerhof pathway or, at least by some species, to lactic acid,
acetic acid, ethanol, and formic acid under glucose limitations; pentoses are
fermented to lactic acid and acetic acid via an inducible phosphoketolase).
Produces gallic acid from tannic acid (tannase-positive), but does not convert gallic acid further to pyrogallol.
Positive results for aesculin hydrolysis, fermentation of: arbutin, fructose, galactose, glucose (without gas), lactose, maltose,
mannose, melibiose, N-acetylglucosamine, raffinose, sucrose & trehalose.
Negative results for catalase, fermentation of: adonitol, amygdalin, arabinose, dulcitol, erythritol, gluconate, glycerol, glycogen,
inositol, inulin, mannitol, melezitose, rhamnose, sorbitol, sorbose, starch & xylose.
Variable results for fermentation of: cellobiose, ribose & salicin.
(c) Costin Stoica