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Serological evaluation of relationship between viral pathogens (BHV-1, BVDV, BRSV, PI-3V, and Adeno3) and dairy calf pneumonia by indirect ELISA.In this study, viral pathogens associated with nine outbreaks of naturally occurring dairy calf pneumonia in Mashhad area of Khorasan Razavi province from September 2008 to May 2009 were assessed. Five diseased calves from each farm were chosen for examination. Acute and convalescent serum samples were taken from calves with signs of respiratory disease. Sera were analyzed for antibodies to bovine viral diarrhea virus (BVDV), bovine herpesvirus type 1 (BHV-1), bovine respiratory syncytial virus ...201122198538
prevalence of bovine viral diarrhoea virus antibodies in bulk tank milk of industrial dairy cattle herds in suburb of mashhad-iran.bulk milk for the presence of antibodies against bovine viral diarrhea virus (bvdv) from 38 industrial dairy cattle herds complexes with 250-3000 holstein dairy cows in suburb of mashhad-iran was tested. none of the herds were vaccinated against bvdv. commercial indirect elisa-kit for the detection of specific antibodies was used. the result could be read visually where the optical density (od) was measured at 450 nm. the percent positivity (pp) values >or=7 and <7 interpreted positive and negat ...200818262667
prevalence of bovine viral diarrhoea virus antibodies among the industrial dairy cattle herds in suburb of mashhad-iran.mashhad is a major dairy production in iran. the subject of this study was to survey the seroprevalence of bovine viral diarrhea virus (bvdv) infection using an indirect enzyme-linked immunosorbent assay (elisa) test in industrial dairy cattle herds in suburb of mashhad-iran. totally, 141 serum samples were tested. none of the herds had been vaccinated against bvdv. commercial indirect elisa kit was used. the herds divided to 3 sizes as cow population. they were included: small, medium and large ...200918839325
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