Affiliation: | 1.Instituto Federal do Maranh?o (IFMA), Campus S?o Luis-Maracan?, S?o Luis, MA, Brazil ;2.Department of Veterinary Preventive Medicine, Laboratory of Animal Virology, Londrina, PR, Brazil ;3.Universidade Estadual do Maranh?o, S?o Luis, MA, Brazil ;4.Multi-User Animal Health Laboratory, Molecular Biology Unit, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Londrina, PR, Brazil ;5.National Institute of Science and Technology for Dairy Production Chain (INCT – LEITE), Universidade Estadual de Londrina, Rodovia Celso Garcia Cid - Campus Universitário, PO Box 10011, Londrina, PR, 86057-970, Brazil ; |