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Species/Subspecies: Brachyspira hyodysenteriae
Etymology: Genus name: short spiral
Species epithet: from pig with dysentery
Significance:  [Very important]   
Old Species Name(s):Treponema hyodysenteriae, Serpula hyodysenteriae, Serpulina hyodysenteriae
Taxonomy:
PhylumClassOrderFamilyGenus
SpirochaetesSpirochaetiaSpirochaetalesBrachyspiraceaeBrachyspira
Type Strain: B78 = ATCC 27164 = NCTC 13041
Macromorphology (smell):
Brachyspira hyodysenteriae Brachyspira hyodysenteriae 
Forms small irregular colonies (0.1-1 mm in diameter) spread over the agar surface (the bactera "swarm" on the agar plate). Gives a strong hemolysis on blood agar.
Micromorphology:
Brachyspira hyodysenteriaeBrachyspira hyodysenteriae
Thin (0.3-0.4 x 6-11 µm), spiral shaped and motile. Has 22-28 periplasmic flagella (endoflagella or axial filaments) per cell.
Video: Video clip showing the motility of this species.
Gram +/Gram -:G- (Uppträder som G -, men har en annan typ av cellvägg).
Metabolism: Anaerobic, but aerotolerant
Catalase/Oxidase:
Other Enzymes: Tryptophanase (indol) +, hippuricase -, α-galactosidase -, β-glucosidase +
Fermentation of carbohydrates: D-ribose -
Spec. Char.:
Hosts: Pigs, mallards and rheas (related to ostriches)
Disease (Swedish):svindysenteri
Disease (English):Swine dysentery
Clinical Picture: Bloody diarrhea
Genome Sequence:
Acc-noStrainSize (bp)GenomeRef.
CPOO1357 & CPOO1360 WA1 3 036 634 1c + 1c Nr 93
Storleken på plasmiden är 35 940 bp.

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
U14930 (T) 1433 
Ribosomala RNA-gener är inte organiserade i ett enda rRNA operon hos B. hyodysenteriae.

Taxonomy/phylogeny:
 Brachyspira hyodysenteriae Brachyspira hyodysenteriae
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.
Reference(s): No. 9, 43, 44, 64, 92
Link: The Swedish Brachyspira, Leptospira and Treponema Group
Updated:2016-06-15
 

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Swedish University of Agricultural Sciences