Hemorrhagic bowel syndrome

Attention! This is a potentially life-threatening condition for your Cow. Time is of the essence, contact your veterinarian immediately.

Hemorrhagic Bowel Syndrome

Point Source Hemorrhage, Jejunal Hemorrhagic Syndrome, Dead Gut

Hemorrhagic bowel syndrome (HBS) is a highly fatal, sporadic acute digestive tract disease of adult dairy cattle. Cows with HBS develop large blood clots in the intestine, resulting in obstruction and severe bowel size increase. Clinical signs associated with HBS include acute enteritis, dehydration, shock and sometimes abdominal pain. Cows often die within 12 to 36 hours following onset of clinical signs.

Although the exact cause of HBS is unknown, it is thought to be associated with Clostridium perfringens or Aspergillus fumigatus.

Age Range

It occurs most commonly in adult cattle.

Risk Factors

  • High amount of fermentable carbohydrate in the diet
  • Level of dry matter (DM) intake
  • Feeding a total mixed ration (TMR)
  • Second lactation and older cows
  • Large cow population (greater than 100 cows)
  • An increase in rolling herd average for milk yield
  • Within the first 100 days of lactation




  • Clostridium perfringens

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