| Species/Subspecies: | Fusobacterium necrophorum subsp. necrophorum | ||||||||
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| Category: | Causes hemolysis | ||||||||
| Etymology: | Genus name: small spindle shaped rod. Species epithet: necrosis producing. Subspecies epithet: see Species epithet. | ||||||||
| Significance: | [Very important] | ||||||||
| Old Species Name(s): | Bacteroides necrophorus, Fusobacterium necrophorum (Biotyp A) | ||||||||
| Taxonomy: | Class Fusobacteriia Order Fusobacteriales Family Fusobacteriaceae Genus Fusobacterium |
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| Type Strain: | VPI 2891 = ATCC 25286 = CCUG 9994. | ||||||||
| Macromorphology (smell):
| Small cream-colored metal shiny colonies. Many strains produce an hemolysis zone on blood agar. Smells like rancid butter (or boiled cabbage). Colonies fluoresce in neon green under long-wave UV-light. | ||||||||
| Micromorphology: | Coccoid rods to thin, needle-shaped filaments. Non-motile. | ||||||||
| Gram +/Gram -: | G- | ||||||||
| Metabolism: | Strictly anaerobic | ||||||||
| Catalase/Oxidase: | -/- | ||||||||
| Other Enzymes: | Esculinase -, lipase -, Tryptophanase + (= indole +). | ||||||||
| Fermentation of carbohydrates: | Butyric acid is produced by fermentation. | ||||||||
| Spec. Char.: | Temperature optimum: 37°C. | ||||||||
| Disease: | Liver abscesses and interdigital necrobacillos (foot rot etc). This bacterium is regarded as a secondary pathogen in ovine foot rot. |
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| Hosts: | Cattle, sheep (and humans) | ||||||||
| Clinical Picture: | |||||||||
| Virulence Factors: | Produces a leucotoxin directed against neutrophils and has LPS. | ||||||||
| Genome Sequence: |
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| 16S rRNA Seq.: |
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| Taxonomy/phylogeny:
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Within the genus Fusobacteria, 14 species have been described and 2 of these are divided into 7 sub-species. Fusobacteria are related to genus Streptobacillus, but the latter belongs to another family, namely Leptotrichiaceae. | ||||||||
| Comment: | Can convert lactic acid to propionic acid. | ||||||||
| Reference(s): | No. 24 | ||||||||
| Updated: | 2020-12-10 |