Analysis of the intensity of post-vaccination immunity to acute respiratory viral infections of cattle

Of the acute respiratory viral infections in farms of Udmurt Republic, parainfluenza-3, syncytial infection, infectious rhinotracheitis, diarrhea are most common. For prevention these cattle diseases, inactivated combined vaccine Kombovak and R. is used. Despite widespread use this vaccine, there an ambiguous situation UR percentage ARVI incidence extremely variable. Along with general economic factors, can be explained using different schemes for vaccine. The work was carried out conditions industrial livestock complex located Uvinsky district Republic. During period work, 1,383 heads vaccinated Kombovak-R were monitored. Laboratory tests BI "Udmurt Veterinary Diagnostic Center" city Izhevsk LLC "Independent "Chance-Bio" Moscow. Determination immunity intensity retrospective serological diagnosis by examining paired blood serum samples. Blood samples taken from clinically healthy cows at 6th month pregnancy, i.e. end inter-vaccination period, as well unvaccinated calves a live weight 50-55 kg age 17-18 days after 21 days, respectively. When studying preservation post-vaccination cows, it found that only two five studied animals have protective level antibodies to period. Serological screening showed pathogens IRT, VD, RSI PI-3 determined all nevertheless, titers differed significantly.