1. Veterinary Hospital, Federal University of Campina Grande, Patos, Paraíba, Brazil (Pessoa, Riet-Correa, Pimentel, Garino Jr, Dantas, Tabosa)
2. Pathology Department, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil (Kommers)
3. Veterinary Pathology Laboratory, Veterinary and Agronomy Faculty, University of Brasília, Brasília, Federal District, Brazil (Reis-Júnior)