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Spatial patterns of pathogen prevalence in questing Ixodes ricinus nymphs in southern Scandinavia, 2016

Kjaer, Lene Jung and Klitgaard, Kirstine and Soleng, Arnulf and Edgar, Kristin Skarsfjord and Lindstedt, Heidi Elisabeth H. and Paulsen, Katrine M. and Andreassen, Ashild Kristine and Korslund, Lars and Kjelland, Vivian and Slettan, Audun and Stuen, Snorre and Kjellander, Petter and Christensson, Madeleine and Teräväinen, Malin and Baum, Andreas and Jensen, Laura Mark and Bodker, Rene (2020). Spatial patterns of pathogen prevalence in questing Ixodes ricinus nymphs in southern Scandinavia, 2016. Scientific Reports. 10 , 19376
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Abstract

Tick-borne pathogens cause diseases in animals and humans, and tick-borne disease incidence is increasing in many parts of the world. There is a need to assess the distribution of tick-borne pathogens and identify potential risk areas. We collected 29,440 tick nymphs from 50 sites in Scandinavia from August to September, 2016. We tested ticks in a real-time PCR chip, screening for 19 vector-associated pathogens. We analysed spatial patterns, mapped the prevalence of each pathogen and used machine learning algorithms and environmental variables to develop predictive prevalence models. All 50 sites had a pool prevalence of at least 33% for one or more pathogens, the most prevalent being Borrelia afzelii, B. garinii, Rickettsia helvetica, Anaplasma phagocytophilum, and Neoehrlichia mikurensis. There were large differences in pathogen prevalence between sites, but we identified only limited geographical clustering. The prevalence models performed poorly, with only models for R. helvetica and N. mikurensis having moderate predictive power (normalized RMSE from 0.74-0.75, R-2 from 0.43-0.48). The poor performance of the majority of our prevalence models suggest that the used environmental and climatic variables alone do not explain pathogen prevalence patterns in Scandinavia, although previously the same variables successfully predicted spatial patterns of ticks in the same area.

Authors/Creators:Kjaer, Lene Jung and Klitgaard, Kirstine and Soleng, Arnulf and Edgar, Kristin Skarsfjord and Lindstedt, Heidi Elisabeth H. and Paulsen, Katrine M. and Andreassen, Ashild Kristine and Korslund, Lars and Kjelland, Vivian and Slettan, Audun and Stuen, Snorre and Kjellander, Petter and Christensson, Madeleine and Teräväinen, Malin and Baum, Andreas and Jensen, Laura Mark and Bodker, Rene
Title:Spatial patterns of pathogen prevalence in questing Ixodes ricinus nymphs in southern Scandinavia, 2016
Series Name/Journal:Scientific Reports
Year of publishing :2020
Volume:10
Article number:19376
Number of Pages:14
Publisher:NATURE RESEARCH
ISSN:2045-2322
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
URN:NBN:urn:nbn:se:slu:epsilon-p-109987
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109987
Additional ID:
Type of IDID
DOI10.1038/s41598-020-76334-5
Web of Science (WoS)000594628800038
ID Code:21290
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:19 Jan 2021 16:03
Metadata Last Modified:19 Jan 2021 16:11

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