1. Virology Laboratory; Department of Microbiology, Immunology and Parasitology; Institute of Basic Health Sciences; Federal University of Rio Grande do Sul (UFRGS); Porto Alegre Rio Grande do Sul Brazil
2. Fepagro Animal Health -Institute of Veterinary Research Desidério Finamor (IPVDF); Eldorado do Sul Rio Grande do Sul Brazil
3. Pathology Laboratory; Department of Clinical Pathology; Faculty of Veterinary Sciences; Federal University of Rio Grande do Sul (UFRGS); Porto Alegre Rio Grande do Sul Brazil