Atresia

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Atresia ani
Pig - atresia ani (Courtesy of Elspeth Milne)
  • A common congenital defect of the lower gastrointestinal tract.
  • Both the anus and rectum can be affected.
  • Occurs in all species but is most often seen in calves and pigs.
Atresia coli
  • Considered the most common segmental anomaly of the intestine in domestic animals.
  • Can affect in particular the spiral colon of Holstein calves and the small colon of foals.
Atresia ilei
  • It is less common to see atresia in the small intestine.
  • Mostly seen in calves.