1. Department of Biology, Faculty of Veterinary Medicine , University of Belgrade , 11000 Belgrade
2. Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine , University of Belgrade , 11000 Belgrade
3. Department of Pathology, Faculty of Veterinary Medicine , University of Belgrade , 11000 Belgrade
4. Department of equine, small animal, poultry and wild animal diseases, Faculty of Veterinary Medicine , University of Belgrade , 11000 Belgrade
5. ISP, INRA , Université Tours , UMR1282, 37380, Nouzilly, France