1. Department of Pathology, Section of Microbiology, University of Verona, 37100 Verona, Italy
2. Institute of Microbiology, University of Padua, 35100 Padua, Italy
3. Clinical Microbiology Laboratory, San Bortolo Hospital, 30100 Vicenza, Italy
4. Zooprophylaxis Institute, 35100 Padua, Italy