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Multi-Year Monitoring of the Tick–Pathogen System in Natural Foci of Tick-Borne Encephalitis in the Suburbs of Irkutsk

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Abstract

The state of the natural foci of tick-borne encephalitis (TBE) was monitored during 15 seasons (2005–2019) in several key plots within a popular recreational and tourism area along Highway 25K-011 Irkutsk–Baikal. The populations of the virus and its main vector, the taiga tick Ixodes persulcatus, were shown to be in a stable state. The studied plots varied strongly in the density of adult ticks and in its multi-year and seasonal dynamics. Spatial and temporal variations in the tick infection rate were detected, but no specific trend over the study period was observed. The multi-year density dynamics of the vector did not correlate with that of its infection rate. A significant role of the taiga tick males in dissemination of the TBE virus has been highlighted.

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ACKNOWLEDGMENTS

The authors are grateful to M.A. Borzenko, T.I. Borisova, D.B. Verzhutsky, P.E. Vershinin, M.O. Gorina, I.M. Morozov, A.Ya. Nikitin, A.V. Sevostyanova, E.A. Sidorova, N.V. Yakovchits, and other colleagues who took part in collection and processing of the tick samples in different years.

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Correspondence to O. V. Melnikova.

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Statement on the welfare of animals. All the applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All the procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were conducted.

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Melnikova, O.V., Vershinin, E.A., Verzhutskaya, Y.A. et al. Multi-Year Monitoring of the Tick–Pathogen System in Natural Foci of Tick-Borne Encephalitis in the Suburbs of Irkutsk. Entmol. Rev. 101, 1471–1484 (2021). https://doi.org/10.1134/S0013873821090232

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