Nodular lesions in the absence of Oesophagostomum columbianum.
D000818:Animals; D002432:Cecum / Q000473:pathology*; D003106:Colon / Q000473:pathology*; D009814:Oesophagostomiasis / Q000473:pathology / Q000662:veterinary*; D012756:Sheep; D012757:Sheep Diseases / Q000473:pathology*