Rectal stricture

Rectal constriction or narrowing is a frequent pathology considered as a consequence of rectal prolapse.

Alternative names: Rectal constriction or narrowing


It is a common disease considered as a sequel of the rectal prolapse. There is a scar tissue on the last section of the rectum of about a finger long and it starts to shrink gradually and eventually will close the tube completely. The area where the constriction or narrowing occurs is irrigated by two small arteries originating from the aorta and some studies suggest that if these arteries are blocked or have thrombosis due to bacterial action a rectal constriction or narrowing occurs. This condition has been linked to Salmonella.



Sows and lactating piglets

  • Not present.

Nursery and fattening stage

  • A very liquid diarrhea which appears as a jet.
  • A gradual enlargement of the abdomen.
  • Loss of body condition.
  • Constipation.

Causes / Contributing Factors

  • Infection and thrombosis of blood vessels.
  • Sequel of a rectal prolapse.
  • Sequel of chronic irritation of the rectum (like Salmonella).



  • It is based on clinical signs.



  • There is no treatment for this condition and as soon as they are diagnosed pigs should be taken to slaughter for animal welfare reasons.
  • Attempting to open a constriction by rectal palpation does not usually have good results.
  • If there are rectal strictures or narrowing in a large number of animals occurring at the same time, this must be investigated to see if an infection is causing the problem (especially Salmonella) check the effects of strategic medication using it with an injection, in water or feed.

Atlas of pathology

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