title: Digestion in horses after resection or ischemic insult of the large colon.
abstract: The effect of 60% resection of the large colon vs ischemic insult without resection on the ability of horses to digest grass hay was investigated. Digestion trials were performed on 9 horses before surgery (base line) and 3 weeks, 6 weeks, and 6 months after surgery. The percentage of apparent digestion of crude protein, crude fiber, nitrogen-free extract, calcium, phosphorus, magnesium, manganese, copper, and zinc was calculated. Horses that had resection (n = 5) had decreased apparent digestion of crude protein, crude fiber, and phosphorus 3 weeks after surgery, compared with those in horses with ischemic insults (n = 4) and with base-line values. Horses with ischemic insults also had a decrease in crude protein digestion 3 weeks after surgery, compared with base-line values. All horses returned to base-line values of digestion at the 6-month trials, although horses that had resection had higher fecal concentrations of phosphorus and nitrogen-free extract than did horses with ischemic insult. During the study, all horses had maintained good body condition.
mesh_terms: D000818:Animals; D002118:Calcium / Q000378:metabolism; D003082:Colectomy / Q000009:adverse effects / Q000662:veterinary*; D003106:Colon / Q000098:blood supply / Q000502:physiology / Q000503:physiopathology; D003300:Copper / Q000378:metabolism; D004043:Dietary Fiber / Q000378:metabolism; D004044:Dietary Proteins / Q000378:metabolism; D004063:Digestion; D005243:Feces / Q000032:analysis; D005260:Female; D006734:Horse Diseases / Q000503:physiopathology; D006736:Horses / Q000502:physiology*; D007511:Ischemia / Q000503:physiopathology / Q000662:veterinary; D008274:Magnesium / Q000378:metabolism; D008297:Male; D008345:Manganese / Q000378:metabolism; D010758:Phosphorus / Q000378:metabolism; D006109:Poaceae; D015032:Zinc / Q000378:metabolism
chemical_list: D004043:Dietary Fiber; D004044:Dietary Proteins; D010758:Phosphorus; D008345:Manganese; D003300:Copper; D008274:Magnesium; D015032:Zinc; D002118:Calcium