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Heterobilharzia americana infection in a Grant's zebra (Equus burchelli boehmi)
J Y Rodriguez1, B M Finneburgh2, B C Lewis3
1Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Mailstop 4467, Texas A&M University, College Station, TX 77843-4467, United States of America; Zoetis Petcare, 10 Sylvan Way, Parsippany, NJ 07054, United States of America.
Abstract:
Heterobilharzia americana is a trematode parasite (family: Schistosomatidae) of mammalian wildlife that occasionally infects domestic dogs and horses in the southeastern United States. This report presents the first case of H. americana infection in a Grant's zebra (Equus burchelli boehmi). The parasite was diagnosed post mortem as an incidental finding by histopathologic identification of H. americana eggs in the liver parenchyma after the zebra succumbed in an accidental traumatic death. Molecular analysis of a portion of the parasite small subunit ribosomal RNA gene demonstrated 100% identity with DNA sequences from parasites previously characterized in domestic horses. Equine infections with H. americana are considered uncommon, but are probably underdiagnosed.
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