Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Eosinophilic myositis in a slaughtered Korean native cattle | J. Vet. Sci. 2008 9 4 425-427 JOURNAL OF Short Communication Veterinary Science Eosinophilic myositis in a slaughtered Korean native cattle Sun Hee Do1 2 Da-Hee Jeong1 Jae-Yong Chung1 Jin-Kyu Park1 Hai-Jie Yang1 Dong-Wei Yuan1 Kyu-Shik Jeong1 Department of Veterinary Pathology College of Veterinary Medicine Kyungpook National University Daegu 702-701 Korea 2College of Veterinary Medicine Konkuk University Seoul 143-701 Korea Histopathological findings of eosinophilic myositis in the carcass of a slaughtered Korean native cow are presented. Lesions contained massive fibrous septae with vacuolar changes in some lesions and the hypercontraction and rupturing of muscle bundles with replacement by eosinophils. Necrosis and severe eosinophil infiltration were observed. Sarcoplasmic fragmentation and atrophy developed. Typical of granuloma calcified myofibers were focally surrounded by macrophages and numerous inflammatory cells and multinucleated giant cell formation was evident. Keywords eosinophilic myositis granuloma Korean native cow myofiber Eosinophilic myositis EM is a collective term used in meat inspection to designate diseases of clinically healthy animals that have focal greencolored muscular lesions of unknown origin 7 10 . EM is a relatively rare condition in cattle and sheep of all ages 7 8 . Previous reports have provided evidence that Sarcocystis are directly associated with the lesions and contribute to rejection and downgrading of carcasses at meat-processing plants 1 2 5 . Bovine EM has been only rarely described. The cause of EM remains unknown since most cases were detected during a routine postmortem inspection and because there is little tissue reaction in the intermediate host cattle in which asexual development of Sarcocystis occurs. Presently we describe a case of EM in a 3-year-old cow with a normal history and no pre-existing clinical conditions at the time of slaughter. A routine postmortem inspection of the carcass revealed generalized .
