is a species of the class Spirochaetes in the family Brachyspiraceae and order Spirochaetales.
Brachyspira aalborgi
Brachyspira alvinipulli
Brachyspira hyodysenteriae
Brachyspira innocens
Brachyspira intermedia
Brachyspira murdochii
Brachyspira pilosicoli