Pathogenicity of Intestinal Spirochetes Associated with Porcine Colonic Spirochetosis

University of Nebraska 1996 Swine Day Report. We reported on a new species of intestinal spirochete bacterium, Serpulina pilosicoli, associated with a diarrheal disease of growerfinisher swine, called porcine colonic spirochetosis (PCS). In this report we show that Serpulina pilosicoli, associated with outbreaks of PCS in the United States, attached to the cecal surface of chicks while Serpulina innocens, a non-pathogenic intestinal spirochete, did not. These findings support a role for Serpulina pilosicoli as a cause of diarrhea and reduced feed efficiency in swine.