Korean Journal of Veterinary Research 2008;48(2):187-190.
Idiopathic eosinophilic myositis in Korean native cattle (Bos taurus coreanae)
Seong-Hee Rhee1, Il-Jeoung Yu1, Jong-Hoon Kim1, Jung-Kee Kwon1, Jinho Park1, Myung-Jo You1, Jeong-Won Lee2, Hee-Jin Park1, Irina Chekarova1, Gerry Amor Camer3, Chae-Woong Lim1, Bumseok Kim1
1Bio-safety Research Institute and College of Veterinary Medicine, Chonbuk National University
2Jeongeup Branch, Institute of Live Stock and Veterinary Research
3College of Veterinary Medicine, University of Eastern Philippines
Eosinophilic myositis lesions are characterized by severe eosinophil infiltration along muscles of affected animals. The exact cause of the lesion remains controversial and the carcass is condemned once this lesion is seen during meat inspection. A cow slaughtered in Chonbuk province, Korea was observed to have disseminated pale foci throughout the musculature; meat samples were obtained and macroscopically investigated. Cut ends of neck and thigh muscle tissues showed variably sized, multifocal pale white-grayish nodular lesions. Histopathological examination consistently revealed inflammatory lesions with adjacent infiltration of eosinophilic granulocytes and focal necrotic calcification. However, no parasites, including Sarcocystis sp., could be discerned in the affected carcass. This case was diagnosed as idiopathic eosinophilic myositis in cattle.
Key Words: cattle, eosinophil, eosinophilic myositis, muscle

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