1. Veterinary Faculty, University of Teramo, P.za A. Moro, 45, 64100 Teramo, Italy
2. Abruzzo Lazio and Molise National Park, Viale Santa Lucia, 67032 Pescasseroli (AQ), Italy
3. National Reference Centre for Leptospirosis, Istituto Zooprofilattico della Lombardia e dell'Emilia Romagna, Via Bianchi, 9, 25124 Brescia, Italy