| Issue |
E3S Web of Conf.
Volume 222, 2020
International Scientific and Practical Conference “Development of the Agro-lndustrial Complex in the Context of Robotization and Digitalization of Production in Russia and Abroad” (DAIC 2020)
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|---|---|---|
| Article Number | 02032 | |
| Number of page(s) | 7 | |
| Section | Modern Directions of Highly Productive Environmentally Friendly Agro- and Water Management, Development and Implementation of Systems for the Rational use of Modern Chemical and Biological Protection of Agricultural Plants and Animals, the Use of New Drugs, Growth Agents, Antidepressants, Immunostimulants, Probiotics and Feed Additives | |
| DOI | https://doi.org/10.1051/e3sconf/202022202032 | |
| Published online | 22 December 2020 | |
Analysis of the linkage between viral, bacterial, and protozoal infections and the level of reproductive losses in dairy herds in the Ural region
Federal State Budgetary Institution “Ural Federal Agrarian Scientific Research Center of the Ural Branch of the Russian Academy of Sciences”, 620142 Yekaterinburg, Russia
* Corresponding author: nauka_sokolova@mail.ru
The analysis of the linkage between infection of dairy herds in the Ural region with BVDV, BHV-1, C. abortus and N. caninum with indices of reproductive function and reproductive losses was performed. The results of studies of 1453 samples of biological material by Elisa, PCR and Real-Time PCR were taken into account. The level of BVDV infection in animals of various physiological groups in the examined farms ranged from 15.6 to 66.7%, and the seroprevalence of the BHV-1 field strain was 31.8%. The amount of seroprevalent to C. abortus animals in dairy herds was 55.1 %, to N. caninum-43.3%. The lowest rates of fertilization were found in farms with simultaneous circulation of chlamydia and neosporosis pathogens and in mono-chlamydia infection. In these same herds, there was a longer post-partum interval. The highest mean rate of abortions in cows and heifers was in farms with N. caninum circulation, as well as in mixed infections, with increased action of infectious factors. In the analysis of viral infections, it was established that the highest level of perinatal losses was seen in the presence of BVDV.
© The Authors, published by EDP Sciences, 2020
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