Pseudomonas aeruginosa sepsis in an adult horse with enteric Salmonellosis


Address correspondence and reprint requests to:
Dr. Imogen Johns, George D. Widener Hospital for Large Animals, New Bolton Center, University of Pennsylvania, 382 West Street Rd, Kennett Square, PA 19348.


Objective: To report a case of enteric Salmonellosis and Pseudomonas aeruginosa bacteremia in an adult horse.

Case summary: A 7-year-old mare presented for signs of acute abdominal pain. Exploratory laparotomy allowed surgical correction of right dorsal displacement of the large colon with a 180° volvulus at the cecocolic ligament. Postoperatively, the mare developed fevers, leukopenia, and diarrhea. Salmonella newport was cultured from the feces and P. aeruginosa from 2 consecutive blood cultures. The mare responded well to intensive medical therapy.

New or unique information provided: Bacteremia associated with colitis is unusual in an adult horse, although the percentage of animals that may be bacteremic is unknown. The bacteria isolated, P. aeruginosa, a common pathogen of other sites in the horse, has not, to our knowledge, been previously reported as a cause of bacteremia and septicemia in an adult horse.