Hemorrhagic bowel syndrome

The cause of intestinal hemorrhagic syndrome in pigs is unknown, but its outcome is a sudden death.

Alternative names: HBS


Intestinal hemorrhagic syndrome is a syndrome whose cause is unknown. It is thought to occur after high carbohydrate fermentation, but this has not been proven. Affected animals have good body condition and usually are found dead near feeder, very pale and with a distended abdomen.



Gilts, young boars and fattening stage

  • Sudden death.
  • Distended abdomen.
  • Pale pigs.
  • On very rare occasions you can see a lot of blood in the stool, minutes before dying

Causes / Contributing Factors

  • Factors that cause or contribute to the syndrome are unknown.



  • Necropsy identifying a hemorrhagic intestine with bloody liquid content which does not coagulate. It is important to differentiate intestinal torsion or acute ileitis.



  • None.
  • It is suspected that the use of fiber in feed can decrease the incidence of outbreaks.
  • Some authors suggest using antibiotics in animal feed, but this has not been confirmed.

Atlas of pathology

See images in the Altlas related to Hemorrhagic bowel syndrome