1Department of Food Hygiene and Public Health, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
2Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
3Department of Food Hygiene, Faculty of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
Although the high infection rate of microscopic sarcocyst occurs in cattle, to the best of our knowledge, there is no report about the identification of macroscopic sarcocyst in Iran. In this work, Sarcosystis hirsuta was first isolated from slaughtered cattle. In a 2-year-old slaughtered cattle, morphological examination revealed 3-5 mm in length cysts distributed in different striated muscles, particularly intercostalis and diaphragm. In electron microscopy study, ultramicroscopic structure of primary cyst wall based on the presence of cone-shaped villar protrusions confirmed the occurrence of S. hirsuta.