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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology

Species/Subspecies: Brachyspira intermedia
Categories: Causes hemolysis; motile
Etymology: Genus name: short spiral
Species epithet: intermediary (refers to the fact that it seems to be related to both B. hyodysenteriae and B. innocens).
Significance:  [Important]   
Alternative Species Name(s):Serpulina intermedia
Type Strain: PWS/A = ATCC 51140.
Macromorphology (smell):
Forms small irregular colonies (0.1-1 mm in diameter), which may spred over the agar surface (the bactera "swarm" on the agar plate). Gives a weak hemolysis on blood agar.
Thin, spiral shaped and motile. Has 24-28 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.
Other Enzymes: Tryptophanase +/-, hippuricase -, α-galactosidase -, β-glucosidase +
Fermentation of carbohydrates: D-ribose -
Spec. Char.:
Disease:Intestinal disease in chicken
Hosts: Pig, chicken
Clinical Picture:
Genome Sequence:
Acc-noStrainSize (bp)Genome
CP002874 PWS/AT 3 304 788  

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
U23033 PWS/AT 1458 

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.
Comment:Give production disturbancies in laying hens
Reference(s): No. 18, 64, 69, 92
Link: The Swedish Brachyspira, Leptospira and Treponema Group


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