بررسي وضعيت آلودگي به هيپودرما و ابتلا به هيپودرموزيس در دام ها در كشتارگاه اروميه

Survey on the rate of infestation with Hypoderma spp. and hypodermosis in Urmia slaughterhouse

The objectives of this study were to determine the rate of infestation with Hypoderma spp. Over the four season of the year and timing of the parasite life cycle in slaughtered ruminants in Urmia, Iran. After a preslaughter inspection of the animal. intemal suface of the esophagus from its cranial to its distal end. spinal canal from cervical vertebrae to end of sacrum. internal surface of skin and the surface of body were examined for the presence of Hypoderma larvae in slaughtered cattle and buffalo. In sheep and goat only the internal surface of the skin and the surface of the body were examined. The results showed that Hypoderma bovis was the main Hypoderma spp. infesting cattle in that region. Initially, first instar larvae were seen in the epidural fat of the spine in mid-December, and they were found in the spine to early-March. The peak rate of infection in the spine was 47% found in January-February. The second and third instars were first found in subdermal tissue of back in February, then till July the larvae were seen under the skin of the back. The maximum rate of subdermal tissue infestation was 36% observed in mid-April. The intensity and relative frequency of subdermal tissue infestation were more significant (p