作者单位:University of Ondokuz Mayis, Faculty of Veterinary Medicine, Department of Pathology, Kurupelit, 55200, Atakum, Samsun, Turkey[1]University of Ondokuz Mayis, Faculty of Veterinary Medicine, Department of Pharmacology and Toxicology, Kurupelit, 55200, Atakum, Samsun, Turkey[2]