| Species/Subspecies:
|
Mannheimia haemolytica |
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| Etymology:
|
Genus name: named after the German microbiologist Walter Mannheim.
Species epithet: hemolysing. |
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| Significance: | [Very important]
|
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| Old Species Name(s): | Pasteurella haemolytica, biotype A |
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| Taxonomy:
|
| Phylum | Class | Order | Family | Genus |
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| Proteobacteria | Gammaproteobacteria | Pasteurellales | Pasteurellaceae | Mannheimia |
|
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| Type Strain:
|
J.A. Watt 1266A&B = ATCC 33396 = CCUG 408 and 12392 = NCTC 9380. |
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Macromorphology (smell):
  
  | Small greyish colonies (1-2 mm in diameter). Give a weak hemolysis on blood agar, which is easier to observe if the colonies are removed. |
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| Micromorphology:
| Nonmotile small rod |
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Gram +/Gram -:
   | G- |
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| Metabolism:
|
Facultatively anaerobic |
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| Catalase/Oxidase: | +/+ |
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| Other Enzymes:
| Tryptophanase -, ornithine decarboxylase -, urease -. |
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| Biochemical Tests:
| Citrate -, hydrogen sulphide (H2S) -, methyl red -, Voges-Proskauer -. |
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| Fermentation of carbohydrates:
|
| D-Glucose | Lactose | Maltose | L-rhamnose | Sucrose |
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| + | + | + | - | + | | L-Arabinos | Cellobios | D-mannitol | Salicin | Trehalose |
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| - | ? | + | ? | - | | Glycerol | Inulin | Raffinose | D-sorbitol | Starch |
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| v | - | + | + | ? |
Other carbohydrates: Adonitol -, dextrin +, D-fructose +, D-fucose -, D-galactose +, D-glycogen -, mannose -, D-melezitose -, D-melibiose -, D-ribose +, L-sorbose -, xylitol -, D-xylose +. |
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| Spec. Char.:
| |
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| Hosts:
| Cattle, sheep |
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| Disease (Swedish): | Luftvägsinfektion |
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| Disease (English): | Bovine respiratory disease (BRD) or bovine pneumonic mannheimiosis (pasteurellosis). In English also known as "shipping fever". |
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| Clinical Picture:
| |
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| Virulence Factors:
| Adhesines (two membrane proteins OmpA and Lpp1), capsule, endotoxin (toxic for bovine endothelial cells) and leukotoxin (pore-forming cytolysin). |
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| 16S rRNA Seq.:
|
| Acc-no | Strain | Number of NT | Operon |
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| AF060699 | NCTC 9380T | 1 504 | |
|
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| Taxonomy/phylogeny:
|
|
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| Reference(s):
| No. 108 |
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