Abstract
We report on the complete genome sequences of strongly hemolytic Brachyspira hyodysenteriae strain B204 and weakly hemolytic Brachyspira hyodysenteriae strain JR80 as an important contribution for studying the genetic basis for these different phenotypes. The basionym for both strains is Treponema hyodysenteriae, and the homotypic synonym is Serpulina hyodysenteriae.