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The intensity of population immunity in cattle after vaccine prophylaxis against acute respiratory viral infections

https://doi.org/ 10.17238/issn2072-6023.2018.4.89

Abstract

Currently, the main methodical method of specific prevention and control of acute respiratory viral infections (ARI) in cattle is vaccination. The aim of the studies was to carry out serological monitoring of the intensity of postvaccinal immunity to pathogens of ARI in cattle populations in agricultural organizations of the Urals region for the period 2015-2017. Serum from cattle of different physiological groups from 26 farms (n = 3044) was tested in indirect hemagglutination assay (IHA) and hemagglutination inhibition assay (HAI). Samples from farms in which the "Kombovac" and "Hiprabovis-4" vaccines were used. In 2015, 15.4% of farms reported nonobservance of vaccination plans, such as omissions of the next injection of vaccine; absence of vaccination coverage for all age groups; variation of the intervals between vaccination and revaccination; variation in the doses and methods of vaccine inoculation. In 2016, the number of such farms increased to 19.2%, in 2017 - to 30.8%. In a comparative analysis of the results of serology, it was found that in animals in farms without nonobservance of vaccination plans, a high titer of post-vaccinating antibodies to BHV-1, BVDV and BPIV-3 was detected in 96.1-97.5% of calves and in 98.7-100% of adults cattle. In case nonobservance of vaccination plans against ARI in cattle, the "protection index" of the population in the surveyed farms as a whole is reduced to 87.5-88.0%. Preserve epizootic well-being in relation to ARI, control epizootic process and limit dissemination of field strains of pathogens possible only with the formation of persistent protective population immunity, which is possible only with constant attention and planned methodical work.

About the Authors

A. P. Poryvaeva
Federal state budgetary scientific institution "Ural Federal Agrarian Scientific Research Centre, Ural Branch of the Russian Academy of Science"
Russian Federation


I. V. Vyalykh
Federal state budgetary scientific institution "Ural Federal Agrarian Scientific Research Centre, Ural Branch of the Russian Academy of Science"
Russian Federation


V. R. Nurmyeva
Federal state budgetary scientific institution "Ural Federal Agrarian Scientific Research Centre, Ural Branch of the Russian Academy of Science"
Russian Federation


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Review

For citations:


Poryvaeva A.P., Vyalykh I.V., Nurmyeva V.R. The intensity of population immunity in cattle after vaccine prophylaxis against acute respiratory viral infections. Legal regulation in veterinary medicine. 2018;(4):89-93. (In Russ.) https://doi.org/ 10.17238/issn2072-6023.2018.4.89

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ISSN 2782-6252 (Print)