Dynamics of Ticks’ Infestation With Borrelia Genus Bacteria and Tick-Borne Encephalitis Virus in Kirov Region

Бессолицына, Е. А.; Волков, С. А.; Столбова, Ф. С.

doi:10.15789/2220-7619-2017-2-171-180

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…Kirov or Udmurtia regions) belong to the same ecological zones and are TBEV endemic territories. For example, 36 out of 160 (22,5%) ticks collected in Kirov region in 2016 were TBEV-positive [ 45 ]. Unfortunately, there were just two sequences (out of 976 E- gene fragment sequences) from these territories that are publicly available.…”

Section: Discussionmentioning

confidence: 99%

Baltic Group Tick-Borne Encephalitis Virus Phylogeography: Systemic Inconsistency Pattern between Genetic and Geographic Distances

et al. 2020

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Tick-Borne Encephalitis Virus (TBEV) is a dangerous arbovirus widely distributed in Northern Eurasia. The area of this pathogen changes over time. At the beginning of the 2000s, the Ixodes tick populations in Karelia increased. At the same time, the area of I. persulcatus, the main vector of the Siberian TBEV subtype, also expanded. Herein, we sequenced 10 viruses isolated from ticks collected in three locations from the Karelia region in 2008–2018. PCR positive samples were passaged in suckling mice or pig embryo kidney cells (PEK). After the second passage in suckling, mice viral RNA was isolated and E-gene fragment was sequenced. Viral sequences were expected to be similar or nearly identical. Instead, there was up to a 4.8% difference in nucleotide sequence, comparable with the most diverse viruses belonging to the Baltic subgroup in Siberian TBEV subtype (Baltic TBEV-Sib). To reveal whether this was systemic or incidental, a comprehensive phylogeographical analysis was conducted. Interestingly, viruses within each geographic region demonstrated comparable diversity to the whole Baltic TBEV-Sib. Moreover, Baltic TBEV-Sib has a distribution area limited by three ecological regions. This means that active virus mixing occurs in the vast geographic area forming one common virus pool. The most plausible explanation is the involvement of flying animals in the TBEV spread.

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Section: Discussionmentioning

confidence: 99%

Baltic Group Tick-Borne Encephalitis Virus Phylogeography: Systemic Inconsistency Pattern between Genetic and Geographic Distances

et al. 2020

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Infestation dynamics of ticks with Anaplasma and Ehrlichia pathogens in the Kirov region

Bessolicyna¹

2022

Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences

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Anaplasmosis and ehrlichiosis are transmissible diseases of both humans and domestic animals, causing serious harm to health and agriculture. But only ticks taken from humans are analyzed. The purpose of this work is to determine the presence of the genetic material of microorganisms of the Anaplasma and Ehrlichia genera in ixodid ticks of various species collected in the Kirov region in the period from 2010 to 2021 using the polymerase chain reaction. During the study, 1487 ticks of three species as Ixodes persulcatus, Dermacentor reticulatus, and Ixodes ricinus have been analyzed. The percentage of infestation with bacteria of the Ehrlichia genus (from 20.6 to 60.6 %) is higher than that of the Anaplasma bacteria (from 4.8 to 36 %). The presence of both pathogens is also observed (from up to 32 %). The percentage of infestation varies, the presence of pathogens does not depend on each other. The Dermacentor reticulatus, Ixodes ricinus ticks have a significantly lower percentage of infestation than Ixodes persulcatus. Monitoring the infestation ticks with pathogens of anaplasmosis and ehrlichiosis will allow organizing the prevention of these diseases.

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Разнообразие И Распространение Вирусов Клещевого Энцефалита Балтийской Группы, "Природа"

Девяткин¹,

Бугмырин²,

Вакуленко³

et al. 2021

Priroda

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Вирус клещевого энцефалита (ВКЭ) — возбудитель тяжелого заболевания, вызывающего поражения центральной нервной системы. Недавно мы определили последовательность фрагментов геномов ВКЭ, выделенных из иксодовых клещей, которые были собраны в Карелии в 2008–2018 гг. На одном небольшом по площади участке было выявлено генетическое разнообразие вирусов балтийской группы ВКЭ, которое сопоставимо с их разнообразием на огромной территории от Финляндии на западе до Челябинской области на востоке. Более того, разнообразие вирусов соизмеримо в каждом отдельном регионе. Иначе говоря, на обширной территории происходило и, возможно, продолжает происходить активное перемешивание вирусов. Наиболее правдоподобное объяснение тому — участие в распространении ВКЭ летающих животных (вероятнее всего — птиц).

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Dynamics of Ticks’ Infestation With Borrelia Genus Bacteria and Tick-Borne Encephalitis Virus in Kirov Region

Cited by 3 publications

References 11 publications

Baltic Group Tick-Borne Encephalitis Virus Phylogeography: Systemic Inconsistency Pattern between Genetic and Geographic Distances

Baltic Group Tick-Borne Encephalitis Virus Phylogeography: Systemic Inconsistency Pattern between Genetic and Geographic Distances

Infestation dynamics of ticks with Anaplasma and Ehrlichia pathogens in the Kirov region

Разнообразие И Распространение Вирусов Клещевого Энцефалита Балтийской Группы, "Природа"

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