1. Department of Public Health and Infectious Diseases, Section of Parasitology, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185, Rome, Italy
2. Istituto Zooprofilattico Sperimentale del Mezzogiorno, Via Salute n 9, Portici, Naples, Italy
3. Section of Avellino, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Monteforte Irpino, Avellino, Italy
4. Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy