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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Fusobacterium necrophorum subsp. necrophorum
Category: Causes hemolysis
Etymology: Genus name: small spindle shaped rod.
Species epithet: necrosis producing.
Subspecies epithet: see Species epithet.
Significance:  [Very important]   
Alternative Species Name(s):Bacteroides necrophorus, Fusobacterium necrophorum (Biotyp A)
Taxonomy:
Phylum
Fusobacteria
Class
Fusobacteriia
Order
Fusobacteriales
Family
Fusobacteriaceae 
Genus
Fusobacterium
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.
Hosts: Cattle, sheep (and humans)
Clinical Picture:
Virulence Factors: Produces a leucotoxin directed against neutrophils and has LPS.
Genome Sequence:
Acc-noStrainSize (bp)Genome
Not reported    

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AJ867039 ATCC 25286 1455  

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:Can convert lactic acid to propionic acid.
Reference(s): No. 24
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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