1. Unit of Microbiology, Department of Biomedical Sciences and Public Health, Polytechnic University of Marche Medical School , Via Tronto 10/A, 60126, Ancona , Italy
2. Department of Research and Development, Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche ‘Togo Rosati’ , Perugia , Italy
3. Unit of Microbiology, Department of Life and Environmental Sciences, Polytechnic University of Marche , Ancona , Italy
4. Department of Microbiology, Istituto Zooprofilattico Sperimentale delle Venezie , Padova , Italy