| Mannheimia caviae |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Gammaproteobacteria, Order Pasteurellales, Family Pasteurellaceae, Genus
Mannheimia, Mannheimia caviae Christensen et al. 2011.
Old synonym: Bisgaard taxon 25.
Mannheimia, Mannheimia caviae Christensen et al. 2011.
Old synonym: Bisgaard taxon 25.
Gram-negative coccoid or pleomorphic rods. Non-motile.
Colonies on bovine blood agar are regular, circular and slightly raised with an entire
margin, smooth, shiny, opaque with a greyish tinge and have a diameter of 1.0-1.5
mm after 24 h incubation at 37 ºC. Beta-haemolysis is not produced and CAMP test is
negative. V-factor (NAD) is not required. Grows on MacConkey agar. No growth in the
presence of KCN.
margin, smooth, shiny, opaque with a greyish tinge and have a diameter of 1.0-1.5
mm after 24 h incubation at 37 ºC. Beta-haemolysis is not produced and CAMP test is
negative. V-factor (NAD) is not required. Grows on MacConkey agar. No growth in the
presence of KCN.
Isolated from guinea pigs.
May be involved in purulent conjunctivitis in guinea pigs.
- Christensen H, Bojesen AM, Bisgaard M. Mannheimia caviae sp. nov., isolated from epidemic conjunctivitis and otitis media in
guinea pigs. Int J Syst Evol Microbiol 2011; 61:1699-1704. - Li F, Zhao W, Zhu J, Hong Q, Shao Q, Yang S. Mannheimia ovis sp. nov., Isolated from Dead Sheep with Hemorrhagic
Pneumonia. Curr Microbiol 2020; 77:3504-3511. - 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 acid and alkaline phosphatase, alanine aminopeptidase, catalase, alpha- and beta-galactosidase,
beta-glucosidase, leucine arylamidase, nitrate reduction, ornithine decarboxylase, oxidase, phosphatase, porphyrin synthesis,
beta-xylosidase, acid production from: amygdalin, arbutin, L(+) arabinose, L-arabitol, cellobiose, aesculin, D(-) fructose, D(+)
galactose, D(+) glucose (without gas production), glycerol, gentiobiose, myo-inositol, lactose, D(-) mannitol, melibiose, raffinose, D(-)
ribose, salicin and D(+) xylose.
Negative results for arginine dihydrolase, Simmons citrate, gelatinase, beta-glucuronidase, alpha-glucosidase, H2S production (TSI),
indole production, methyl red test, alpha-mannosidase, lysine decarboxylase, phenylalanine deaminase, trypsin, alpha-chymotrypsin,
Tween 20 and 80 hydrolysis, urease, Voges-Proskauer test, valine arylamidase, acid production from: adonitol, D(+) arabitol, dextrin,
dulcitol, meso-erythritol, D(+) fucose, D(+) glycogen, inulin, D(+) mannose, maltose, melezitose, palatinose, L(+) rhamnose, L(-)
sorbose, trehalose, turanose, xylitol and L(-) xylose.
Variable results for alpha-fucosidase, acid production from: D(-) arabinose, L(-) fucose, sucrose and D(-) sorbitol.
beta-glucosidase, leucine arylamidase, nitrate reduction, ornithine decarboxylase, oxidase, phosphatase, porphyrin synthesis,
beta-xylosidase, acid production from: amygdalin, arbutin, L(+) arabinose, L-arabitol, cellobiose, aesculin, D(-) fructose, D(+)
galactose, D(+) glucose (without gas production), glycerol, gentiobiose, myo-inositol, lactose, D(-) mannitol, melibiose, raffinose, D(-)
ribose, salicin and D(+) xylose.
Negative results for arginine dihydrolase, Simmons citrate, gelatinase, beta-glucuronidase, alpha-glucosidase, H2S production (TSI),
indole production, methyl red test, alpha-mannosidase, lysine decarboxylase, phenylalanine deaminase, trypsin, alpha-chymotrypsin,
Tween 20 and 80 hydrolysis, urease, Voges-Proskauer test, valine arylamidase, acid production from: adonitol, D(+) arabitol, dextrin,
dulcitol, meso-erythritol, D(+) fucose, D(+) glycogen, inulin, D(+) mannose, maltose, melezitose, palatinose, L(+) rhamnose, L(-)
sorbose, trehalose, turanose, xylitol and L(-) xylose.
Variable results for alpha-fucosidase, acid production from: D(-) arabinose, L(-) fucose, sucrose and D(-) sorbitol.
(c) Costin Stoica
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