1. Department of Hygiene, Technology and Control of Food Products of Animal Origin, Vete¬rinary Legislation and Management; Faculty of Veterinary Medicine, Trakia Univer-sity, Stara Zagora, Bulgaria
2. National Reference Laboratory on Salmonella, Campylobacter, Staphylococci and Anti-microbial Resistance, National Centre for Food Safety National Diagnostic and Research Veterinary Institute, Sofia, Bulgaria