Authors
P. T. Iliev
Department of Veterinary Microbiology, Infectious and Parasitic diseases, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria
Z. T. Kirkova
Department of Veterinary Microbiology, Infectious and Parasitic diseases, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria
A. S. Tonev
Department of Veterinary Microbiology, Infectious and Parasitic diseases, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria