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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

New names of taxa within the classification category phylum

During October 2021, an article was published by A. Oren och G.M. Garrity, in which new names are proposed for a number of taxa within the classification category phylum. This has resulted in many discussions in social media about whether it was really necessary to make these changes, which have created confusion among microbiologists and other professionals who come into contact with bacteriology.

Published 2022-09-28. Read more...

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