1. 1 Veterinary Specialised Institute ‘Subotica’ Segedinski put 88 24000 Subotica Serbia
2. 2 Belgrade University Department of Pathology, Faculty of Veterinary Medicine Belgrade Serbia
3. 3 Szent István University Department of Pathology and Forensic Veterinary Medicine, Faculty of Veterinary Science István u. 2 H-1078 Budapest Hungary
4. 4 Scientific Veterinary Institute ‘Novi Sad’ Novi Sad Serbia