histopathological study of esophageal infection with gasterophilus pecorum (diptera: oestridae) in persian onager (equus hemionus onager)

Background: the larval stages of gasterophilus are obligate parasites in the gastrointestinal tract of equine account-able for pathologic ulcers in the persian onager gastrointestinal. the aim of the current report was to study the histo-pathological change with g. pecorum larvae in the esophagus of a persian onager. methods: this study was performed in iranian zebra propagation and breeding site in khartouran national park, southeast of shahrud city, semnan province, iran in 2014. following a necropsy with specific refer to esophagus of one adult female persian onager were transmitted to the laboratory. after autopsy, parasites collected from the esophagus were transmitted into 70% alcohol. for histopathological investigation, tissue samples were collected from the esophagus. the tissues were fixed in 10% buffered formalin, and conformity routine processing, there were stained with hematoxylin and eosin. results: after clarity by lactophenol parasites were identified as g. pecorum. microscopic recognition contained hyperemia, inflammatory cell infiltration, epithelial destruction, esophageal gland hyperplasia. conclusion: this is the first survey of g. pecorum and histopathological study in the persian onager esophagus in the world.