Epidemiological Situation on Tick-Borne Viral Encephalitis in the Russian Federation in 2015 and Prognosis for 2016

Nikitin, A. Ya.; Носков, А. К.; Андаев, Е. И.; Пакскина, Н. Д.; Yatsmenko, E. V.; Веригина, Е. В.; Балахонов, С. В.

doi:10.21055/0370-1069-2016-1-40-43

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…Literature data and long-term observations allow concluding that immune prevention against TBE in Tyumen region is accomplished in a scope that is one of the highest in Russia and it obviously indicates that results of laboratory examinations performed on ticks removed off bitten people are not taken into account when immunoglobulin is prescribed [18].…”

Section: T a B L Ementioning

confidence: 99%

Influence exerted by biological and social risk factors on morbidity with tick-borne en-cephalitis in some regins in the Urals Federal District

Мищенко¹,

Kshnyasev²,

Zakharova³

et al. 2019

Health Risk Analysis

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Tick-borne encephalitis (TBE) as an infectious disease remains a significant issue in the Urals Federal District (the UFD). To correctly describe impacts exerted by risk factors on TBE epidemic process, it is necessary to analyze both common and individual peculiarities related to how TBE epidemic process develops on endemic administrative territories.We assessed impacts exerted by biological and social factors on morbidity with TBE in four endemic regions in the UFD (Sverdlovsk, Chelyabinsk, Tyumen, and Kurgan regions) over 2007-2017. To quantitatively assess contributions made by specific factors into morbidity with TBE, we calculated chances for people who suffered tick bites to fall ill with TBE; it allowed us to apply standard procedures within generalized linear models theory (GLM), namely logistic regression. Our analysis included aggregated data on quantity of people who were bitten by ticks and fell will with TBE in all the examined regions. We also assessed data for each specific region as all these endemic territories had both common and specific regularities related to TBE endemic process development.We showed statistically significant impacts exerted by specific manageable risk factors (vaccination, immune prevention, and acaricide treatment performed on a territory) on a possibility of TBE occurrence among people bitten by ticks on endemic territories. The examined UFD regions differ as per effects produced by natural and social risk factors on TBE development. Mass vaccine prevention is a key factor in the control over morbidity with the disease.Risk-oriented approach provides significant additional data for analyzing an epidemiological situation and planning efficient preventive activities in TBE natural foci.

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Section: T a B L Ementioning

confidence: 99%

Influence exerted by biological and social risk factors on morbidity with tick-borne en-cephalitis in some regins in the Urals Federal District

Мищенко¹,

Kshnyasev²,

Zakharova³

et al. 2019

Health Risk Analysis

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“…Thus in 2015 in Russia 2116 TBE cases are reported, and 24 (1.13%) patients died, inter alias, one child under 17 [2]. In some regions of northern Europe there is uptrend in TBE incidence [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…KR territory is 416.8 km 2 and lies 840 km north and south, thus covering a few climatic zones: Arctic deserts, tundra, forest tundra, conifer forest, mixed forest. Natural and climatic conditions, presence of ixodic ticks (Ixodes persulcatus Schulze, 1930 dominates) [10], and diversity of hosts provide the best conditions for TBD distribution over KR.…”

Section: Introductionmentioning

confidence: 99%

Seroprevalence of Tick-borne Diseases in the Population of the European North of Russia

Токаревич¹,

Stoyanova²,

Гнатив³

et al. 2017

Med Safe Glo Heal

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Objective: The uptrend in the incidence of Tick-borne Diseases (TBD) is a new challenge for public health in many countries, especially those in the Arctic zone. The objective of our study was to assess the TBD seroprevalence in the population of Komi Republic (KR) located in the northeast of European Russia. Materials and methods:Blood serum was sampled from 343 (183 men, 160 women) healthy donors aged 20-70 and tested with Enzyme-Linked Immunosorbent Assay (ELISA).Results: IgG antibodies to TBD pathogens were detected in 66 (19.2%) samples: 47 (13.7%) samples contained antibodies to TBE virus, 18 (5.3%) those to Borrelia, and 5 (1.5%) those to Anaplasma phagocytophilum, 4 samples contained antibodies to TBE mixed with those to another TBD. The results were compared with those of an earlier serological survey and showed a significant increase in the seroprevalence IgG antibodies to TBE (13.7 ± 1.9% in 2013, and 3.5 ± 0.75% in 2001, respectively). In the sera samples of occupationally-risk professionals the IgG antibodies to TBD were more common than in the rest of donors (36.2 ± 7.0% and 16.6 ± 2.2%; p<0.05), in men more common than in women (25.1 ± 3.2% and 12.5 ± 2.6%; p<0.01), and young men (20-34 years) were the most affected. Discussion:The situation in KR justifies the need for professional advancement of medical practitioners in TBD treatment, and revision of regional plans for anti-epidemic measures. Attention should be given to the effectiveness of health education, particularly among indigenous people who inhabit territory where tick bites are recorded. Conclusion:Significant growth of TBE seroprevalence evidences the increased risk of acquiring TBE by KR population, including the inhabitants of settlements where this infection was never reported previously.

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Ecological and epidemiological characteristics of tick-borne encephalitis in St. Petersburg

Сюзюмова

Tel’nova

Шапарь³

et al. 2020

Russian Journal of Infection and Immunity

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Here, we provide an analysis on 1996-2016 St. Petersburg tick-borne encephalitis (TBE) epidemiological and ecological data. In particular, two main TBE transmission vectors were observed in St. Petersburg: I. persulcatus and I. ricinus. TBE tick contamination was 0.61% as shown by ELISA and polymerase chain reaction data. It is found that number of subjects seeking for medical aid due to tick bites rises, whereas TBE incidence declines. In particular, a mean 1996-2002 vs. 2010-2016 tick-bite incidence rate increased from 141.9 up to 288.9, respectively. Despite that the Leningrad region is a major area for TBE spread, however, a risk of exposure to tick bites as well as TBE infection exists even in the city of St. Petersburg. In connection with this, around 1,000 subjects undergo tick bites within the city limits. Moreover, whereas a 1996-2002 mean TBE incidence rate was 1.66, it decreased in 2010-2016 down to 1.17. A peak TBE incidence was documented in St. Petersburg Kurortny, Pushkinsky and Primorsky districts. In addition, males vs. females suffered from TBE at higher frequency in Russian Federation, with its peak incidence rate being reported in children under 14 that differs St. Petersburg from the most of other regions in the Russian Federation. A seasonal distribution of TBE cases in St. Petersburg does not differ from that one for the remainder of Russian regions, which displays a spring-summer seasonality lasting from April to September. Of note, 1996-2016 St. Petersburg TBE mortality was 1.37%. A coverage of TBE vaccinated population tends to rise but still remains at low level (0.25-0.58%). Lack of reported TBE cases in occupationally threatened human cohorts evidences about efficient preventive measures. Detection of TBE virus-specific serum antibodies in 5.0% apparently healthy and unvaccinated residents in St. Petersburg significantly complements the official TBE recording data and provides a more accurate understanding of its actual spread.

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Epidemiological Situation on Tick-Borne Viral Encephalitis in the Russian Federation in 2015 and Prognosis for 2016

Cited by 5 publications

References 4 publications

Influence exerted by biological and social risk factors on morbidity with tick-borne en-cephalitis in some regins in the Urals Federal District

Influence exerted by biological and social risk factors on morbidity with tick-borne en-cephalitis in some regins in the Urals Federal District

Seroprevalence of Tick-borne Diseases in the Population of the European North of Russia

Ecological and epidemiological characteristics of tick-borne encephalitis in St. Petersburg

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