Affiliation: | 1.Laboratory of Bacterial Diseases; Sector of Preventive Veterinary Medicine and Public Health,Universidade Federal de Vi?osa,Vi?osa,Brazil;2.Instituto Nacional de Tecnolog??a Agropecuaria, Balcarce,Mar del Plata National University,Mar del Plata,Argentina;3.SERIDA,Villaviciosa,Spain;4.Pathology Department; Veterinary School,Universidade Estadual do Maranh?o,S?o Luís,Brazil |