Abstract
ABSTRACT. de Sousa V.E., Bezerra D.C., Chaves N.P., Santos H.P. & Pereira H.M. [Frequency of antibodies against bovine viral diarrhea virus (BVDV) and bovine herpesvirus 1 (BoHV-1) in female dairy cattle production system in semi-intensive]. Frequência de anticorpos e fatores de risco associados à infecção pelo Vírus da Diarréia Viral Bovina (BVDV) e Herpesvírus Bovino Tipo 1 (BoHV-1) em fêmeas bovinas leiteiras criadas em sistema de produção semi-intensivo. Revista Brasileira de Medicina Veterinária, 35(1):21-25, 2013. Curso de Medicina Veterinária, Centro de Ciências Agrárias, Universidade Estadual do Maranhão, Cidade Universitária Paulo VI, Caixa Postal 09, Tirical, São Luís, MA 65055-970, Brasil. E-mail: helderpereirap@yahoo.com.br The object of this study was estimate the frequency of reacting animals to BVDV and BoHV-1 in milk-jug bovines cattles breeding in semi-intensive system of production. Were analyzed 156 blood’s serum to BVDV and 160 to BoHV-1, from bovines females, by the test of indirect ELISA. The frequency of bovines serologically reacting to BVDV and BoHV-1 were 67,30% (105/156) and 67,50% (108/160), respectively. The results acquired in this research allowed to conclude that the BVDV and BoHV-1 are present in evaluated cattles with a high frequency and the risk factors such as milk production between 1 and 5 liters when it was the BVDV and the absent of veterinary care related to BoHV-1 are related to the infection and there is a positive and strong association between both infections.