1. Virology Sector, Laboratory of Immunopathology Keizo Asami Federal University of Pernambuco Recife Pernambuco Brazil
2. Virology Sector, Department of Preventive Veterinary Medicine Federal University of Santa Maria Santa Maria Rio Grande do Sul Brazil
3. Department of Microbiology and Parasitology Federal University of Santa Maria Santa Maria Rio Grande do Sul Brazil
4. Department of Immunology Aggeu Magalhães Institute, Oswaldo Cruz Foundation Recife Pernambuco Brazil
5. Department of Physiology and Pharmacology Federal University of Pernambuco Recife Pernambuco Brazil