Authors
Georgi M. Stoimenov
Department of Infectious Pathology and Food Hygiene, Sofia, Bulgaria
Gabriela V. Goujgoulova
National Diagnostic Research Veterinary Medical Institute, Sofia, Bulgaria
Branimir Nikolov
Department of Clinical Pathology, Sofia, Bulgaria
Kalin Hristov
Department of Surgery, Radiology, Obstetrics and Gynaecology, Faculty of Veterinary Medicine, Sofia, Bulgaria
Atanaska Teneva
Department of Plant Protection, Faculty of Agronomy, University of Forestry, Sofia, Bulgaria