|Species/Subspecies:||Fusobacterium necrophorum subsp. necrophorum|
|Etymology:||Genus name: small spindle shaped rod.
Species epithet: necrosis producing.
Subspecies epithet: see Species epithet.
|Old Species Name(s):||Bacteroides necrophorus, Fusobacterium necrophorum (Biotyp A)|
|Type Strain:||VPI 2891 = ATCC 25286 = CCUG 9994.|
||Small cream-colored metal shiny colonies. Many strains produce a thin 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-|
|Other Enzymes:||Esculinase -, lipase -, Tryptophanase + (= indole +).|
|Fermentation of carbohydrates:||Butyric acid is produced by fermentation.|
|Spec. Char.:||Temperature optimum: 37°C.|
|Hosts:||Cattle, sheep (and humans)|
|Disease:||Liver abscesses and interdigital necrobacillos (foot rot etc). This bacterium is regarded as a secondary pathogen in ovine foot rot.|
|Virulence Factors:||Produces a leucotoxin directed against neutrophils and has LPS.|
|16S rRNA Seq.:|
||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.|