Abstract
The active development of urban agglomerations, manifested in the development of suburban areas for living, recreation and economic activity, leads to the formation of anthropurgic foci of transmissible tick-borne infections and, in particular, to an increase in the incidence of tick-borne encephalitis. The purpose of the study was to assess the epidemiological situation of tick-borne viral encephalitis in the territory of urban agglomerations of the Russian regions of Western Siberia, as the most endemic in this nosology territories of the country. Material and methods. In conducting a retrospective epidemiological study, the data of the sanitary-epidemiological service of the regions of the Siberian Federal District, regional health authorities, statistical data of the Federal State Statistics Service for 2000-2017 were used. Statistical data processing was carried out in the program Statistica 12.0, the construction and analysis of cartograms - in the program ArcGIS. Results. In the regions of the Siberian Federal District, from 19.8% to 79.3% of the total incidence of tick-borne encephalitis is composed of urban agglomerations. 84.6% of all cases of the disease in the overall structure of the incidence of the urban population of this infection accounted for the 5 most endemic subjects. Exceeding the average long-term incidence rate of the urban population of the Siberian Federal District in 8.1 ± 0.840/0000 was typical for regions whose cities are located either in the northern part or in areas with piedmont and mountain landscapes. Discussion. The leading factors that influence the formation of morbidity indicators were tick virus viruses (r=0.82; p<0.001), the urban stratum immune population (r=-0.43; p<0.001) and acaricide treatments of the territory (r=-0.45; p<0.001). Conclusion. An assessment of the epidemiological situation of tick-borne viral encephalitis among the urban population of endemic areas of the Siberian Federal District, based on the results of multivariate analysis, revealed the leading factors shaping morbidity and the areas most likely to be infected with tick-borne encephalitis.
