1. Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, São Paulo, Brazil, 05508-270
2. Laboratory of Herpetology, Butantan Institute, São Paulo, São Paulo, Brazil, 05503-900
3. Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, São Paulo, Brazil, 05508-270