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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]   
Alternative 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):
 
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:
 
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:2021-09-16

News

The revised taxonomy of the mollicutes

The revised taxonomy of mollicutes (mycoplasmas) has now been introduced on VetBact, which means that many of the species have been given new genus names or moved to another higher taxon. 

Published 2021-11-25. Read more...

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