Phylum “Actinobacteria”, Class Actinobacteria, Order Bifidobacteriales, Family Bifidobacteriaceae, Genus Bifidobacterium,
Bifidobacterium psychraerophilum Simpson, Ross, Fitzgerald and Stanton 2004.
Historic synonym: Bifidobacterium psychroaerophilum Simpson et al. 2003.
Gram-positive short and irregular rods, 0,7-1.0 / 0.8-1.5 µm with occasional bifurcations,
occurring singly or in pairs. Non-motile. Non-spore-forming.
Colonies are convex, with smooth edges, up to 3 mm in diameter after 3 days of
anaerobic incubation at 37 ºC on mMRS agar and 1 mm under aerobic conditions.
Optimum growth temperature 37 ºC; can grow at 42, but not at 46 ºC; weak at 4 ºC.
Grows at pH 4.5-8.0. Facultatively anaerobic.
Isolated from a pig caecum (contents and epithelium), Ireland.
- Laureys D, Cnockaert M, De Vuyst L and Vandamme P, 2016. Bifidobacterium aquikefiri sp. nov., isolated from water kefir. Int J Syst
Evol Microbiol 66, 1281-1286.
- Simpson PJ, Ross RP, Fitzgerald GF and Stanton C, 2004. Bifidobacterium psychraerophilum sp. nov. and Aeriscardovia aeriphila
gen. nov., sp. nov., isolated from a porcine caecum. Int J Syst Evol Microbiol 54, 401-406.
Positive results for acid phosphatase, alpha-arabinosidase, arginine arylamidase, alpha- and beta-galactosidase, alpha- and beta-
glucosidase, glycine arylamidase, histidine arylamidase, leucine arylamidase, naphtol-AS-BI-phosphohydrolase, proline
arylamidase, phenylalanine arylamidase, serine arylamidase, tyrosine arylamidase, acid production from amygdalin, L-arabinose, D-
fructose, D-galactose, D-glucose, gluconate, gentiobiose, melezitose, melibiose, methyl alpha-D-glucopyranoside, raffinose, D-
ribose, salicin, sucrose, and D-xylose.
Negative results for catalase, casein hydrolysis, gelatin hydrolysis, indole production–nitrate reduction–oxidase, urease, alanine
arylamidase, cystine arylamidase, esterase lipase (C8), alpha-fucosidase, beta-glucuronidase, N-acetyl-beta-glucosaminidase,
lipase (C14), alpha-mannosidase, trypsin, alpha-chymotrypsin, valine arylamidase, acid production from D-adonitol, D-arabinose, D-
and L-arabitol, arbutin, dulcitol, erythritol, esculin, D- and L-fucose, glycogen, glycerol, inositol, inulin, 2- and 5-ketogluconate, D-
lactose, D-lyxose, D-mannitol, D-mannose, methyl alpha-D-mannopyranoside, methyl beta-D-xylopyranoside, N-acetylglucosamine,
rhamnose, D-sorbitol, sorbose, starch, trehalose, D-tagatose, D-turanose, xylitol, L-xylose
Variable results for alkaline phosphatase, acid production from cellobiose and maltose.
(c) Costin Stoica