| Mannheimia ruminalis |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Pasteurellales, Family Pasteurellaceae, Genus Mannheimia,
Mannheimia ruminalis Angen, Mutters, Caugant, Olsen and Bisgaard 1999.
Two distinct phenotypic groups: biovar 1 (does not ferment maltose or dextrin, show variable reactions for fermentation of D-sorbitol
and D-xylose and correspond to Bisgaard Taxon 18 biovars 1 and 3 , Bisgaard et al., 1986) and biovar 2 (ferment maltose and dextrin
and correspond to M. haemolytica biogroup 8D, Angen et al., 1997).
Old synonyms: Actinobacillus lignieresii (Phillips, 1961,1964, 1966), Bisgaard Taxon 18 biovars 1 and 3 (Bisgaard et al., 1986) and M.
haemolytica biogrup 8D (Angen et al., 1997).
Mannheimia ruminalis Angen, Mutters, Caugant, Olsen and Bisgaard 1999.
Two distinct phenotypic groups: biovar 1 (does not ferment maltose or dextrin, show variable reactions for fermentation of D-sorbitol
and D-xylose and correspond to Bisgaard Taxon 18 biovars 1 and 3 , Bisgaard et al., 1986) and biovar 2 (ferment maltose and dextrin
and correspond to M. haemolytica biogroup 8D, Angen et al., 1997).
Old synonyms: Actinobacillus lignieresii (Phillips, 1961,1964, 1966), Bisgaard Taxon 18 biovars 1 and 3 (Bisgaard et al., 1986) and M.
haemolytica biogrup 8D (Angen et al., 1997).
Cells are Gram-negative, nonmotile, small rods or coccobacilli .
Regular, smooth, and graysh on blood agar; 1-2 mm in diameter, nonhemolytic
colonies. Growth on MacConkey is variable.
colonies. Growth on MacConkey is variable.
Isolated from the rumen of sheep or cattle.
Virulence factors have not been described. Not associated with disease.
- Mutters R., Angen Ø., Bisgaard M. 2004. Genus V. Mannheimia. In: Bergey’s Manual of Systematic Bacteriology, Second edition,
Vol two, part B, George M. Garrity (Editor-in-Chief), pp. 907-911. - W.M. Janda, R. Mutters, 2006. Pasteurella, Mannheimia, Actinobacillus, Eikenella, Kingella, Capnocytophaga, and other
miscellaneous Gram-negative rods. In: Topley & Wilson’s Microbiology and Microbial Infections, 10 edition, Vol. 2, Bacteriology,
Edward Arnold Ltd. - Li F, Zhao W, Hong Q, Shao Q, Zhu J, Yang S. Mannheimia bovis sp. nov., Isolated from a Dead Cow with Hemorrhagic
Pneumonia. Curr Microbiol 2021; 78:1692-1698.
Positive results for nitrates reduction, alkaline phosphatase, catalase, ONPG, acid
production from: mannitol, D(-) fructose, D(+) galactose, D(+) glucose (without gas),
sucrose and lactose.
Negative results for gelatinase, H2S production (TSI), Voges-Proskauer, urease, arginine dehydrolase, lysine decarboxylase, ornithine
decarboxylase, indole production, alpha-glucosidase, citrate (Simmons), acid production from: xylitol, L(+) arabinose, L(-) xylose,
dulcitol, meso-inositol, D(+) melibiose, rhamnose, trehalose, D(+) mannose, L(-) sorbose, inulin, and esculin.
Variable results for oxidase, acid production from: glycerol, D(-) arabinose, D(-) sorbitol, L(-) fucose, raffinose & salicin.
Biovar 1 does not produce acid from maltose and dextrin while biovar 2 produce acid from maltose and dextrin.
production from: mannitol, D(-) fructose, D(+) galactose, D(+) glucose (without gas),
sucrose and lactose.
Negative results for gelatinase, H2S production (TSI), Voges-Proskauer, urease, arginine dehydrolase, lysine decarboxylase, ornithine
decarboxylase, indole production, alpha-glucosidase, citrate (Simmons), acid production from: xylitol, L(+) arabinose, L(-) xylose,
dulcitol, meso-inositol, D(+) melibiose, rhamnose, trehalose, D(+) mannose, L(-) sorbose, inulin, and esculin.
Variable results for oxidase, acid production from: glycerol, D(-) arabinose, D(-) sorbitol, L(-) fucose, raffinose & salicin.
Biovar 1 does not produce acid from maltose and dextrin while biovar 2 produce acid from maltose and dextrin.
(c) Costin Stoica
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