Phylum “Actinobacteria”, Class Actinobacteria, Order Bifidobacteriales, Family Bifidobacteriaceae, Genus Bifidobacterium,
Bifidobacterium dentium Scardovi and Crociani 1974.
Gram-positive slender rods, 2-8 µm long, with the extremities often swollen, dumb-bell
shaped or enlarged to give a spatula-like appearance and branching occur at the distal
ends of the cells. Non-motile. Non-spore-forming.
Colonies are flat or umbonate when aged, with entire or undulate margins, often
raised, glistening, cream to white, and soft. Anaerobic. Growth temperature 24-42 ºC,
optimum 39-41 ºC. Grows at pH 6.3-7.2, optimum pH 6.5-6.9; no growth at pH 4.5 and
Isolated from human dental caries and oral cavity, faeces of human adults, human vagina, human abscess and appendix.
Isolated from human dental caries, human abscess and appendix.
- Biavati B, Mattarelli P, 2012. Genus I. Bifidobacterium Orla-Jensen 1924. In: Parte et al. (ed). Bergey’s manual of systematic
bacteriology: The Actinobacteria,Part A and B. Springer, New York, 171-206.
- Scardovi V, Crociani F, 1974. Bifidobacterium catenulatum, Bifidobacterium dentium, and Bifidobacterium angulatum: three new
species and their deoxyribonucleic acid homology relationships. Int J Syst Bacteriology 24(1), 6-20.
- Morita H, Nakano A, Onoda H, Toh H, Oshima K et al., 2011. Bifidobacterium kashiwanohense sp. nov., isolated from healthy infant
faeces. Int J Syst Evol Microbiol 61, 2610-2615.
- Okamoto M, Benno Y, Leung KP and Maeda N, 2008. Bifidobacterium tsurumiense sp. nov., from hamster dental plaque. IJSEM 58,
Positive results for acid phosphatase, alanine arylamidase, alpha-arabinosidase, arginine arylamidase, aesculin hydrolysi, alpha-
and beta-galactosidase, alpha- and beta-glucosidase, glycine arylamidase, histidine arylamidase, leucine arylamidase, proline
arylamidase, phenylalanine arylamidase, phosphoamidase, serine arylamidase, tyrosine arylamidase, Voges-Proskauer test, acid
production from amygdalin, arbutin, amylose, amylopectin, L-arabinose, cellobiose, dextrin, D-fructose, D-galactose, D-glucose,
gluconate, glycogen, gentibiose, 2-ketogluconate, D-lactose, maltose, D-mannitol, D-mannose, melezitose, melibiose, raffinose,
D-ribose, salicin, starch, sucrose, trehalose, turanose, and D-xylose.
Negative results for alkaline phosphatase, arginine dihydrolase, catalase, cystine arylamidase, alpha-fucosidase, gelatin
liquefaction, indole production, lipase (C14), alpha-mannosidase, nitrate reduction, N-acetyl-beta-glucosaminidase,
naphthol-AS-BI-phosphohydrolase, trypsin, alpha-chymotrypsin, urease, valine arylamidase, acid production from D- and L-arabitol,
D-adonitol, D-arabinose, dulcitol, erythritol, dextran, D- and L-fucose, D-galactosamine, D-glucuronate, glycerol, inositol, inulin,
5-ketogluconate, D-lyxose, methyl alpha-D-glucopyranoside, methyl alpha-D-mannopyranoside, methyl beta-D-xylopyranoside,
N-acetylglucosamine, porcine gastric mucin, rhamnose, D-sorbitol, L-sorbose, D-tagatose, xylitol, and L-xylose.
Ammonia not produced from urea.
Variable results for esterase lipase (C8), esterase (C4), beta-glucuronidase, acid production from D-glucosamine, pectin and
(c) Costin Stoica