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Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Fusobacterium necrophorum subsp. funduliforme
Category: Causes hemolysis
Etymology: Genus name: small spindle shaped rod.
Species epithet: necrosis producing.
Subspecies epithet: sausage shaped.
Significance:  [Of minor importance]   
Old Species Name(s):Fusobacterium necrophorum (Biotype B)
Taxonomy:
Phylum
Fusobacteria
Class
Fusobacteriia
Order
Fusobacteriales
Family
Fusobacteriaceae 
Genus
Fusobacterium
Type Strain: Fn524 = ATCC 51357 = CCUG 42162.
Macromorphology (smell):
Fusobacterium necrophorum  
Small greyish and semitranslucent colonies (1-2 mm i diameter), which give hemolysis on FAA plates.
Micromorphology: Rodshaped (0,4-0,8 x 1-8 µm), where shorter cells (1-4 µm) are predominant.
Gram +/Gram -:G-
Metabolism: Obligately anaerobic
Catalase/Oxidase:-/?
Other Enzymes: Esculinase -, lipase -, Tryptophanase + (= indole +).
Spec. Char.:
Disease:This bacterium is e.g. regarded as a secondary pathogen in ovine foot rot.
Hosts: Ungulates etc.
Clinical Picture:
Virulence Factors: roduces a leucotoxin directed against neutrophils and has LPS, but not as much as subsp. necrophorum.
16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
EF447425 B35 1229  

Taxonomy/phylogeny:
Fusobacterium necrophorum  
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:F. necrophorum subsp. funduliforme is less pathogenic than F. necrophorum subsp. necrophorum.
Updated:2020-11-19

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