| Species/Subspecies: | Mannheimia varigena | ||||||||
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| Category: | Causes hemolysis | ||||||||
| Etymology: | Genus name: named after the German microbiologist Walter Mannheim. Species epithet: of different origin (refers to the fact that this species has been isolated from pigs and ruminants). | ||||||||
| Significance: | [Of minor importance] | ||||||||
| Taxonomy: | Class Gammaproteobacteria Order Pasteurellales Family Pasteurellaceae Genus Mannheimia |
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| Type Strain: | 177 = CCUG 38462 | ||||||||
| Macromorphology (smell): | Small, regular and greyish colonies (1-2 mm in diameter). Most strains give hemolysis on bovine blood agar. | ||||||||
| Micromorphology: | Non-motile rods or coccoid rods (0.5 x 1.2 µm). | ||||||||
| Gram +/Gram -: | G- | ||||||||
| Catalase/Oxidase: | +/+ | ||||||||
| Other Enzymes: | Ornithine decarboxylase (+), tryptophanase -, urease -. | ||||||||
| Biochemical Tests: | Citrate -, methyl red -, hydrogen sulphide (H2S) -. | ||||||||
| Fermentation of carbohydrates: | D-glucose + lactose v maltose v L-rhamnose + sucrose + L-arabinose v cellobiose ? D-mannitol + salicin ? trehalose - glycerol (+) inulin - raffinose v D-sorbitol - starch ? |
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| Spec. Char.: | |||||||||
| Special Media: | |||||||||
| Disease: | Pigs: septicemia, enteritis, pneumonia.
Cattle: septicemia, pneumonia, mastitis. |
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| Hosts: | Pigs, cattle | ||||||||
| Clinical Picture: | |||||||||
| Genome Sequence: |
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| 16S rRNA Seq.: |
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| Taxonomy/phylogeny:
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Ten species have been described within genus Mannheimia. The relationship between members within the closely related genera Actinobacillus, Haemophilus and Pasteurella is very uncertain since none of these genera forms monophyletic clusters. | ||||||||
| Reference(s): | No. 108 | ||||||||
| Updated: | 2024-10-23 |