University of Oulu

Cayol, C., Jääskeläinen, A., Koskela, E., Kyröläinen, S., Mappes, T., Siukkola, A., Kallio, E. (2018) Sympatric Ixodes-tick species: pattern of distribution and pathogen transmission within wild rodent populations. Scientific Reports, 8, 16660. doi:10.1038/s41598-018-35031-0

Sympatric Ixodes-tick species : pattern of distribution and pathogen transmission within wild rodent populations

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Author: Cayol, Claire1; Jääskeläinen, Anu2,3; Koskela, Esa1;
Organizations: 1University of Jyväskylä, Department of Biological and Environmental Science
2University of Helsinki, Department of Virology
3Helsinki University Central Hospital Laboratory Services (HUSLAB), Department of Virology and Immunology
4University of Oulu, Department of Ecology and Genetics
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.3 MB)
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Language: English
Published: Springer Nature, 2018
Publish Date: 2018-12-20


The generalist tick Ixodes ricinus is the most important vector for tick-borne pathogens (TBP), including Borrelia burgdorferi sensu lato, in Europe. However, the involvement of other sympatric Ixodes ticks, such as the specialist vole tick I. trianguliceps, in the enzootic circulations of TBP remains unclear. We studied the distribution of I. ricinus and I. trianguliceps in Central Finland and estimated the TBP infection likelihood in the most common rodent host in relation with the abundance of the two tick species. Ixodes trianguliceps was encountered in all 16 study sites whereas I. ricinus was frequently observed only at a quarter of the study sites. The abundance of I. ricinus was positively associated with open water coverage and human population density around the study sites. Borrelia burgdorferi s. l.-infected rodents were found only in sites where I. ricinus was abundant, whereas the occurrence of other TBP was independent of I. ricinus presence. These results suggest that I. trianguliceps is not sufficient, at least alone, in maintaining the circulation of B. burgdorferi s. l. in wild hosts. In addition, anthropogenic factors might affect the distribution of I. ricinus ticks and, hence, their pathogens, thus shaping the landscape of tick-borne disease risk for humans.

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Series: Scientific reports
ISSN: 2045-2322
ISSN-E: 2045-2322
ISSN-L: 2045-2322
Volume: 8
Article number: 16660
DOI: 10.1038/s41598-018-35031-0
Type of Publication: A1 Journal article – refereed
Field of Science: 1183 Plant biology, microbiology, virology
Funding: This project was supported by Kone Foundation, Oskar Öflunds Stiftelse, the University of Jyväskylä and the Academy of Finland (Eva Kallio 250524, 310104, 314103, Esa Koskela 257340 and Tapio Mappes 132190, 268670).
Academy of Finland Grant Number: 250524
Detailed Information: 250524 (Academy of Finland Funding decision)
310104 (Academy of Finland Funding decision)
314103 (Academy of Finland Funding decision)
257340 (Academy of Finland Funding decision)
132190 (Academy of Finland Funding decision)
268670 (Academy of Finland Funding decision)
Dataset Reference: Supplementary information:
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