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The aim of this study was to select swine rotavirus strains for the production of a live vaccine against rotaviral porcine diarrhoeas. The estimation of biological properties of strains was carried out under laboratory and field conditions. Seventeen swine field rotavirus strains were used for the investigations. The in vivo experiments were performed on colostrum-free piglets infected per os or intramuscularly...
Effectiveness of the auto vaccine Dipervac prepared by the authors and containing toxoids alpha and beta of C. perfringens A and C in protecting calves against a toxic diarrhea was examined. The vaccine was used in pregnant cows at 7 and 2-3 weeks before parturition. The vaccine induced a high level of antitoxic antibodies (4-64 ai/ml for alpha and 8—64 ai/ml for beta toxin) without negative effects...
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