Spontaneous BRSV infection in cattle of the state of Alagoas, Brazil

Pesquisa Veterinária Brasileira

Corbellini, Luís G.³  Souza, Maria Izabel de²  Driemeier, David³  Mota, Rinaldo A.⁵  Peixoto, Paulo V.¹  Brito, Marilene F.⁴ 

[1] Universidade Federal Rural do Rio de Janeiro, Seropédica;Universidade Federal Rural de Pernambuco, Garanhuns;Universidade Federal do Rio Grande do Sul, Porto Alegre;Universidade Federal Rural do Rio de Janeiro;Universidade Federal Rural de Pernambuco, Recife

关键词: BRSV infection;    cattle;    Northeast Brazil.;   

DOI  :  10.1590/S0100-736X2000000400008

来源: Colegio Brasileiro de Patologia Animal-CBPA

【 摘 要 】

.- Peixoto P.V., Mota R.A., Brito M.F., Corbellini L.G., Driemeier D. & Souza M.I. 2000. [Spontaneous BRSV infection in cattle of the state of Alagoas, Brazil.] Infecção natural pelo Vírus Sincicial Respiratório Bovino (BRSV) em bovinos no Estado de Alagoas. Pesquisa Veterinária Brasileira 20(4):171-175. Projeto Sanidade Animal Embrapa/UFRRJ, Km 47, Seropédica, RJ 23851-970, Brazil.Cases of bovine respiratory syncytial virus (BRSV) infection affecting calves in the State of Alagoas, Brazil, are described. At least 220 calves, which were the progeny of Brown Swiss and Holstein Friesian cattle imported from Germany, Austria, and Uruguay, have died from the disease since 1995. Clinical signs included fever, dry cough, serous ocular discharge and, towards the final stages, marked dyspnea. On auscultation there were loud and harsh breathing sounds, and a strong wheezing could be heard from a distance. Histopathology of the lung revealed interstitial pneumonia associated with syncytial cells and infiltration by lymphocytes and eosinophils. A few plasma cells containing Russel bodies in their cytoplasm were also observed. There was hyperplasia of type II pneumocytes and mild squamous metaplasia of the respiratory epithelium. Bronchiolar epithelial cells and syncytial cells were positively stained with anti-BRSV antibody. The finding of BRSV infection in calves in Northeast Brazil plus identical findings already reported from South Brazil, strongly indicate the need for a wide epidemiologic survey in order to evaluate the losses due to BRSV infection and the incidence of infected cattle. There is evidence that at least part of the imported animals involved in this outbreak was already infected on arrival at the port of Belém, in the State of Pará, Brazil.INDEX

【 授权许可】

CC BY-NC