1. Department of Pathology, Diagnostic and Clinic Veterinary, Faculty of Veterinary Medicine, Perugia University, Via San Costanzo 4, 06126 Perugia, Italy
2. Department of Biopathological Science and Hygiene of Food and Animal Production, Faculty of Veterinary Medicine, Perugia University, Via San Costanzo 4, 06126 Perugia, Italy