| Species/Subspecies: | Histophilus somni | ||||||||||
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| Etymology: | Genus name: tissue friend. Species epithet: of sleep (refers to one of the disease conditions). | ||||||||||
| Significance: | [Important] | ||||||||||
| Alternative Species Name(s): | Haemophilus agni, Histophilus ovis, Haemophilus somnus, Haemophilus somnifer | ||||||||||
| Taxonomy: | Class Gammaproteobacteria Order Pasteurellales Family Pasteurellaceae Genus Histophilus |
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| Type Strain: | 8025 = ATCC 43625 = CCUG 36157. | ||||||||||
| Macromorphology (smell):
| Some strains are haemolytic. Forms small colonies (0.2-0.5 mm in diameter), which contain a yellow pigment. | ||||||||||
| Micromorphology: | Small nonmotile rods | ||||||||||
| Gram +/Gram -: | G- | ||||||||||
| Metabolism: | Facultatively anaerobic | ||||||||||
| Catalase/Oxidase: | -/+ | ||||||||||
| Other Enzymes: | Esculinase -, tryptophanase (+), urease -. | ||||||||||
| Fermentation of carbohydrates: | D-glucose ? lactose ? maltose + L-rhamnose - sucrose - L-arabinose v cellobiose ? D-mannitol ? salicin ? trehalose + glycerol - inulin - raffinose - D-sorbitol ? starch ? |
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| Spec. Char.: | |||||||||||
| Disease: | ¨
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| Genome Sequence: |
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| 16S rRNA Seq.: |
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| Taxonomy/phylogeny:
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Only one species have been described within genus Histophilus, which is relatively close to Nicoletella semolina, which also is a single species within its genus. | ||||||||||
| Comment: | X- and V-factor are not requirements for growth in contrast to bacteria belonging to the closely related genus Haemophilus. | ||||||||||
| Reference(s): | No. 63 | ||||||||||
| Updated: | 2023-03-29 |