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Serum antibody titers to bovine respiratory syncytial virus were determined for 559 cattle. Serum samples were obtained through the Minnesota State-Federal Brucellosis Laboratory and were collected over a 1-year period. Results of this study revealed an antibody prevalence of 65.5% to bovine respira...
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During a 19-month period, the agar gel immunodiffusion (AGID) test was used as an aid in differential diagnosis of paratuberculosis in 51 cattle with a history of chronic weight loss and/or chronic diarrhea. Thirty-three cattle were AGID test-positive for paratuberculosis. Twenty-eight cattle (87.5%...
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Quercetin was able to reduce the cytotoxic effect of T-2 mycotoxin on cultured murine thymocytes. When given to mice immediately before challenge with T-2 mycotoxins, quercetin significantly reduced mortality.
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An indirect haemagglutination test (IHA) and ELISA technique were developed to detect antibodies against Eimeria tenella. The ELISA technique was relatively easy to perform, more sensitive than the IHA test, and needed only a fraction of the antigen required for IHA. The highest titers using ELISA w...
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Pooled seminal plasma obtained from six bulls was tested for its immunosuppressive activities in vitro on blastogenesis of bovine lymphocytes. Lymphocyte stimulation assay and mixed lymphocyte reaction were used as test procedures. Concanavalin A and phytohemagglutinin were utilized in the lymphocyt...
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Topics discussed in this review include classification of viruses, virus structure, epidemiology of viral infections, cell-mediated and humoral response, viral pathogenicity, viral defences and the detection, treatment and prevention of viral diseases..
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Pasteurella haemolytica exerted a cytotoxic effect on bovine polymorphonuclear neutrophil leukocytes. This effect was less than that seen with cultured alveolar macrophages or peripheral blood monocytes. When alveolar macrophages were cultured with Pasteurella haemolytica, macrophages produced less ...