1. Department of Veterinary Medicine and Pharmacology; University of Messina; Messina Italy
2. Department of Pathology, Infectious Diseases and Animal Origin Food Infection; University of Messina; Messina Italy
3. Provincial Veterinary Service (USL 8); Vibo Valentia Catanzaro Italy
4. Department of Veterinary Science and Technology for Food Saftey; University of Milan; Milan Italy