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Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Brachyspira innocens
Categories: Causes hemolysis; motile
Etymology: Genus name: short spiral
Species epithet: harmless
Significance:It is important to be able to differentiate this brachyspira from pathogenic brachyspiras.
  [Of minor importance]   
Old Species Name(s):Serpulina innocens, Serpula innocens, Treponema innocens.
Taxonomy:
Phylum
Spirochaetes
Class
Spirochaetia
Order
Spirochaetales
Family
Brachyspiraceae 
Genus
Brachyspira
Type Strain: B256 = ATCC 29796 = CCUG 17081
Macromorphology (smell): Forms small irregular colonies (0.1-1 mm in diameter) spred over the agar surface (the bactera "swarm" on the agar plate). Gives a week hemolysis on blood agar.
Micromorphology: Thin (0.25-0.4 x 5.3-14.1 µm), spiral shaped and motile. Has 14-28 periplasmic flagella (endoflagella or axial filaments) per cell.
Gram +/Gram -:G- (Uppträder som G -, men har en annan typ av cellvägg).
Metabolism: Anaerobic, but aerotolerant
Catalase/Oxidase:
Other Enzymes: Hippuricase -, tryptophanase (indol) -.
Spec. Char.:
Disease:B. innocensis regarded as a commensal and is, thus, not pathogenic. This bacterium is often present in the gut flora of different animal species.
Hosts: Pig, dog and poultry.
Clinical Picture:
16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
NR_044763 B256T 1433  

Taxonomy/phylogeny:
 
Seven species with standing in nomenclature has been described within genus Brachyspira. About 10 additional species have been reported, but their names have not been approved. Some of these species have been included in the phylogenetic trees and their names are given within quotation marks (see Fig. 97:5 and 6). All species within the genus Brachyspira are very closely related, but "B. corvi", B. aalborgi and B. pilosicoli differ significantly from the other species.
Updated:2021-03-28

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