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A Case of Ascarid Impaction and Intestinal Perforation in an Adult Zebra (Equus burchelli bohmi)  

Yang, Jae-Hyuk (Equine Hospital of Jeju Race Park, Korea Racing Authority)
Lim, Yoon-Kyu (College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University)
Publication Information
Journal of Veterinary Clinics / v.28, no.4, 2011 , pp. 442-445 More about this Journal
Abstract
Macrocyclic lactone resistance has been reported in populations of Parascaris equorum from several countries. A Grant's zebra (Equus burchelli bohmi) was admitted to the Equine Hospital at Jeju Race Park with signs of chronic weight loss and severe depression. Clinical examination revealed tachycardia and dehydration. Over the course of a day, the zebra suffered from severe abdominal pain and subsequently died. Prior to admission, the zebra had received prophylactic anthelmintic treatment with ivermectin 3 times at 3-month intervals and was dewormed with ivermectin 30 days prior to the onset of depression. At necropsy, there were masses of ascarids in the stomach and small intestine, and intestinal perforation. There are many reports of ivermectin-resistant P. equorum in horses. However, anthelmintic resistance has not been formally demonstrated in zebras. This report describes diagnosed case of gastrointestinal impaction and intestinal perforation by P. equorum in an adult zebra. We suspect that ivermectin-resistant P. equorum larvae were the cause.
Keywords
adult zebra (Equus burchelli bohmi); impaction; ivermectin resistance; Parascaris equorum;
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