1. Graduate Program of Animal Science; Universidade do Estado de Santa Catarina (UDESC); Chapecó SC Brazil
2. Department of Biochemistry and Molecular Biology; Universidade Federal de Santa Maria (UFSM); Santa Maria RS Brazil
3. Department of Microbiology and Parasitology; Universidade Federal de Santa Maria (UFSM); Santa Maria RS Brazil
4. Department of Population Health and Pathobiology; College of Veterinary Medicine; North Carolina State University; Raleigh NC USA