1. Department of Veterinary Medicine, University of Bari Aldo Moro, 70010 Valenzano, Italy
2. Faculty of Veterinary Sciences, University of Teramo, Località Piano d’Accio, 64100 Teramo, Italy
3. Department of La Spezia, Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d’Aosta, Via degli Stagnoni 96, 19100 La Spezia, Italy
4. Department of Environment and Health, Istituto Superiore di Sanità, 00161 Rome, Italy
5. Department of Food Safety, Nutrition and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy