О распространении европейского лесного клеща
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              Ixodes ricinus
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            (Acarina, Ixodidae) в республике Карелия (Россия)

Беспятова, Любовь Алексеевна; Bugmyrin, Sergey

doi:10.31857/s0044513421070035

Cited by 6 publications

(1 citation statement)

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“…Sch., для которого установлено расширение границ в пределах эндемичных районов. В юго-западной части РК обитает I. ricinus L., ареал которого несколько сузился, а северная граница распространения не изменилась [16,17].…”

Section: Introductionunclassified

Assessment of registered and hidden epidemic process of tick-borne encephalitis in the Republic of Karelia

Rubis,

Chevskaya,

Ekimova

et al. 2024

Journal of microbiology, epidemiology and immunobiology

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Introduction. The incidence of tick-borne encephalitis in the Russia remains relevant. The assessment of the epidemic process in the Republic of Karelia is important not only in terms of understanding its general patterns, but in connection with the growth of tourist attendance in the region. Aims: To assess the current epidemic situation of tick-borne encephalitis in the Republic of Karelia, and to compare the characteristics of registered and hidden epidemic processes. Materials and methods. The risk of infection and incidence were estimated based on the analysis of the registered cases of seeking medical help in connection with tick bites, the results of a study of tick-borne encephalitis virus (TBEV) infection rate in ticks, and the epidemiological investigation of cases of tick-borne encephalitis in 1992–2022. Clinical, gender and age structure, territorial distribution of patients and victims of the tick bites were compared with the results of serological studies of 2379 blood samples of the adult population, conducted in 2011–2022. Results. Infection rates of ticks removed from humans ranged from 23.6–27.0% in 2002–2005 to 1.0% in 2022. In 2004, the TBEV antigen was detected in mosquitoes. The territory of risk is the southern part of Republic. However, the increase in number of cases of seeking medical help was observed in the northern part of Republic. The incidence rates exceeded the national average, especially in 2003–2004 (15.3–11.6 per 100 thousand). In 2021–2022, it decreased to 1.8–1.5 per 100,000. The dynamics of incidence had a high-degree correlation with the dynamics of seeking medical help and infection rates in ticks (R = 0.92 and 0.73). The reported incidence was lower than the estimated risk of infection. The meningeal forms of infection were most often diagnosed. The risk of the disease was higher in the elderly and in men, which was determined by the conditions of infection. Antibodies to TBEV were detected in 11.8 ± 0.7% of the examined persons. Conclusion. A steady decrease in rates of registered tick-borne encephalitis incidence has been revealed in the Republic of Karelia, mainly due to the action of biological and natural factors. The assessment of seroprevalence made it possible to reveal the hidden part of the epidemic process.

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Section: Introductionunclassified

Assessment of registered and hidden epidemic process of tick-borne encephalitis in the Republic of Karelia

Rubis,

Chevskaya,

Ekimova

et al. 2024

Journal of microbiology, epidemiology and immunobiology

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Adaptive Features of the Biology of Closely Related Species of Ixodid Ticks That Determine Their Distribution (Illustrated on the Example of the Taiga Tick Ixodes persulcatus Sch. 1930 and the Castor Bean Tick Ixodes ricinus L. 1758)

2021

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Infestation of mice with ixodid ticks in forests of Belgorod region

Гламаздин

Tkachev

Tkachevа

et al. 2022

Vestn. Ross. univ. družby nar., Ser. Agron. životnovod.

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Rodents are one of the largest groups of existing mammals and number more than 2,270 known species, which is almost 42 % of the total biodiversity of worldwide-distributed mammals (except Antarctica and some islands). They are well adapted to various habitats and are known to live alongside people and livestock complexes. The purpose of the study was to study infestation of mice with ixodid ticks in forests of the Belgorod region adjacent to livestock and poultry farms. The study was carried out in 2019-2022. The extensiveness of mice infestation was observed in Sylvaemus sylvaticus species, which was 13.26 % higher (P 0.05) than in Sylvimus flavicollis , and 24.33 % higher (P 0.01) than in Apodemus agrarius . The intensity of infestation with preimaginal (larvae and nymphs) stages of Ixodes ricinus ticks had wide fluctuations depending on the type of synanthropic rodent. Thus, the highest intensity was noted in Sylvaemus sylvaticus mice, which was 8.73 and 13.56 % higher (P 0.001) compared to Sylvimus flavicollis and Apodemus agrarius mice, respectively. The maximum infestation of male synanthropic mouse species was 31 ticks in Sylvaemus sylvaticus , 19 ticks in Sylvimus flavicollis , and 9 ticks in Apodemus agrarius . The intensity of infestation in synanthropic mice was the highest in the summer months (from July to August) and decreased slightly in autumn. In autumn, 41.2 % of the examined rodents were infested with ticks, the predominant species was Ixodes ricinus (larvae). Larvae and nymphs of Ixodes ricinus ticks were more often attached to rodents in the head area (mainly on the ears) - 82 %, less often on other parts of the body - 1 8 %. A smaller number of ticks were present on neck, body, legs, sometimes parasites were found on tail.

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О распространении европейского лесного клеща Ixodes ricinus (Acarina, Ixodidae) в республике Карелия (Россия)

Cited by 6 publications

References 0 publications

Assessment of registered and hidden epidemic process of tick-borne encephalitis in the Republic of Karelia

Assessment of registered and hidden epidemic process of tick-borne encephalitis in the Republic of Karelia

Adaptive Features of the Biology of Closely Related Species of Ixodid Ticks That Determine Their Distribution (Illustrated on the Example of the Taiga Tick Ixodes persulcatus Sch. 1930 and the Castor Bean Tick Ixodes ricinus L. 1758)

Infestation of mice with ixodid ticks in forests of Belgorod region

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