1. Department of Pathology; School of Veterinary Medicine; University of São Paulo, Avenida Prof Dr Orlando Marques de Paiva, 87; Cidade Universitária; São Paulo CEP 05508-900 Brazil
2. Laboratory of Herpetology; Instituto Butantan; Avenida Vital Brazil, Butantan São Paulo CEP 05503-900 Brazil
3. Department of Small Animal Medicine; College of Veterinary Medicine; University of Florida; 2015 SW 16th Avenue Gainesville FL 32610 USA
4. Institute of Biological Sciences; University of São Paulo, Avenida Prof, Lineu Prestes, ICB II; Cidade Universitária; São Paulo CEP 05508-900 Brazil