1. Laboratory of Animal Food Products Hygiene - Veterinary Public Health, School of Veterinary Medicine, Faculty of Health Sciences; Aristotle University of Thessaloniki; Thessaloniki 54124 Greece
2. Food-Water Microbiology Group, Department of Microbiology, School of Medicine, Faculty of Health Sciences; University of Ioannina; Ioannina 45110 Greece
3. Laboratory of Pharmacology, School of Veterinary Medicine, Faculty of Health Sciences; Aristotle University of Thessaloniki; Thessaloniki 54124 Greece