| Bifidobacterium merycicum |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum “Actinobacteria”, Class Actinobacteria, Order Bifidobacteriales, Family Bifidobacteriaceae, Genus Bifidobacterium,
Bifidobacterium merycicum Biavati and Mattarelli 1991.
Bifidobacterium merycicum Biavati and Mattarelli 1991.
Gram-positive irregular rods, 2-5 µm long, sometimes arranged in pairs which forms
angles. Non-motile. Non-spore-forming.
angles. Non-motile. Non-spore-forming.
Colonies are smooth, convex, with entire margins, cream to white, soft and glistening.
Optimum growth temperature is 38-42 ºC. Optimum pH range is 6.5-6.9; not growing
at pH 4.5 and 8.0. Anaerobic.
Optimum growth temperature is 38-42 ºC. Optimum pH range is 6.5-6.9; not growing
at pH 4.5 and 8.0. Anaerobic.
Isolated from bovine rumen.
Undetermined.
- 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. - Biavati B, and Mattarelli P, 1971. Bifidobacterium ruminantium sp. nov. and Bifidobacterium merycicum sp. nov. from the rumens of
cattle. Int J Syst Bacteriol 41(1), 163-168.
Positive results for acid production from L-arabinose, dextrin, D-fructose (weakly), D-galactose, D-glucose, D-lactose, maltose,
melibiose, raffinose, D-ribose, starch, sucrose and D-xylose.
Negative results for catalase, indole production, nitrate reduction, acid production from D- and L-fucose, gluconate, D-glucosamine,
D-glucuronate, glycerol, D-mannitol, D-mannose, melezitose, pectin, porcine gastric mucin, rhamnose, D-sorbitol, trehalose and
xylan.
Variable results for acid production from amylopectin, amylose, cellobiose, D-galactosamine, inulin (weakly) and salicin (weakly).
melibiose, raffinose, D-ribose, starch, sucrose and D-xylose.
Negative results for catalase, indole production, nitrate reduction, acid production from D- and L-fucose, gluconate, D-glucosamine,
D-glucuronate, glycerol, D-mannitol, D-mannose, melezitose, pectin, porcine gastric mucin, rhamnose, D-sorbitol, trehalose and
xylan.
Variable results for acid production from amylopectin, amylose, cellobiose, D-galactosamine, inulin (weakly) and salicin (weakly).
(c) Costin Stoica
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