CARRIER SPECIES OF TICK-BORNE INFECTIONS IN KEMEROVO REGION

Abstract

Aim. Investigation of infection rate and species composition of ticks responsible for tick-borne infections in Kemerovo Region. Materials and Methods. We investigated morphological properties of 1295 Ixodes and 1867 Dermacentor ticks collected from the ora of Kemerovo Region. Genotyping of 186 ticks collected from infected humans was performed using Multiprime Real-Time PCR kit. Infection rate (tick-borne encephalitis, borreliosis, rickettsiosis, granulocytic anaplasmosis, monocytic ehrlichiosis, and Kemerovo virus infection) of 409 ticks collected from the ora and 186 ticks collected from infected humans was also dened by polymerase chain reaction. Results. During the recent decades, Ixodes persulcatus was a predominant tick species in Kemerovo Region, with a prevalence of 96.71%. However, we revealed a trend to increasing prevalence of Ixodes pavlovskyi from 2015 (41.62% of all Ixodes ticks). Dermacentor ticks were endemic, with Dermacentor reticulatus as a predominant species and prevalence of 12.75% from all ticks of Kemerovo Region. Borrelia spp. DNA was identied in 35.60% of I.persulcatus, 25.27% of I.pavlovskyi and 1.96% of D.reticulatus ticks. Anaplasma phagocytophilum and Ehrlichia spp. were found only in Ixodes ticks. RNA of tick-borne encephalitis virus was rarely detected in D.reticulatus and I.persulcatus. R.raoultii (DnS14) and Kemerovo virus were found only in D.reticulatus and I.persulcatus, respectively.Conclusions. Ixodes and Dermacentor ticks are frequently infected by Borrelia spp. but rarely in-fected by tick-borne encephalitis virus. Anaplasma phagocytophilum, Ehrlichia spp., and Kemerovo vi-rus were detected only in Ixodes ticks while R.raoul-tii (DnS14) were found only in D.reticulatus

Keywords

• ixodes
• dermacentor
• клещевой энцефалит
• боррелии
• анаплазмы
• эрлихии
• риккетсии
• ixodes
• dermacentor
• tick-borne encephalitis
• borrelia
• anaplasma
• ehrlichia
• rickettsia