Bifidobacterium porcinum
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum “Actinobacteria”, Class Actinobacteria, Order Bifidobacteriales, Family Bifidobacteriaceae, Genus Bifidobacterium,  
Bifidobacterium porcinum
(Zhu, Li and Dong 2003) Nouioui et al. 2018 .

Synonym:
Bifidobacterium thermacidophilum subsp. porcinum Zhu, Li and Dong 2003.
Gram-positive irregular rods, 0.5 / 3-8 µm long, singly or sometimes arranged in ‘V’
shape. Non-motile. Non-spore-forming.
Colonies are convex, with entire margins, white, and 1.5-2 mm in diameter after 24 h
anaerobic incubation at 37 ºC on TPYG agar. Aggregated cell clumps are formed in
liquid cultures (TPYG liquid) but cells are readily dispersed by shaking. Growth
temperature 30-46.5 ºC, optimum 37-41 ºC, variable at 20 and 50 ºC. Optimum pH
7.0-7.2. Can grow at pH 4.5 and weak growth at pH 4.0. Strictly anaerobic.
Isolated from faeces of a piglet (domestic).
Undetermined.
  1. 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.
  2. Zhu L, Li W and Dong X, 2003. Species identification of genus Bifidobacterium based on partial HSP60 gene sequences and
    proposal of Bifidobacterium thermacidophilum subsp. porcinum subsp. nov. Int J Syst Evol Microbiol 53, 1619-1623.
  3. Pechar R, Killer J, Salmonova H, Geigerova M, Svejstil R, Svec P, Sedlacek I, Rada V and Benada O, 2017. Bifidobacterium apri sp.
    nov., a thermophilic actinobacterium isolated from the digestive tract of wild pigs. Int J Syst Bacteriol 67, 2349-2356.
Positive results for arginine arylamidase, esterase C4, alpha- and beta-galactosidase, alpha- and beta-glucosidase, glycine
arylamidase, histidine arylamidase, leucine arylamidase, naphtol-AS-BI-phosphohydrolase (weak), phosphoamidase, proline
arylamidase, phenylalanine arylamidase, serine arylamidase, tyrosine arylamidase, acid production from D-fructose, D-galactose,
D-glucose, glycogen, melibiose, raffinose, D-sorbitol, starch, sucrose and D-turanose.

Negative results for arginine dihydrolase, acid and alkaline phosphatase, alanine arylamidase, cystine arylamidase, catalase,
esterase lipase C8, alpha-fucosidase, beta-glucuronidase, gelatin liquefaction, H
2S production,indole production, lipase,
alpha-mannosidase, N-acetyl-beta-glucosaminidase, nitrate reduction, oxidase, trypsin, chymotrypsin, urease, valine arylamidase,
acid production from amygdalin, arbutin, D- and L-arabinose, inulin, D-mannitol, D-mannose, methyl alpha-D-mannopyranoside,
methyl beta-D-xylopyranoside, rhamnose, sorbose and L-xylose.

Variable results for acid production from gluconate, D-lactose, melezitose, methyl alpha-D-glucoside (weak), D-ribose, salicin,
trehalose and D-xylose.
(c) Costin Stoica
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