Evidence map›Paper›PMID 30355331›Full record

ArticleParasites & vectors2018

Tick-borne pathogens in Finland: comparison of Ixodes ricinus and I. persulcatus in sympatric and parapatric areas.

Maija Laaksonen, Tero Klemola, Eeva Feuth, Jani J Sormunen, Anna Puisto, Satu Mäkelä, Ritva Penttinen, Kai Ruohomäki, Jari Hänninen, Ilari E Sääksjärvi and 4 more

Open access · goldAbstract readComparative Study
In one paragraph

Article in Parasites & vectors, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed, 2 pooled it
6.7field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

42 citing papers in PubMed, 2 syntheses or guidelines pooled it, 82 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
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  6. Article
  7. Review
  8. Article
  9. Rickettsia spp. in finnish ixodid ticks.Parasites & vectors · 2025
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  10. Review
  11. Repeated cross-sectional surveys show a decreasing trend inEuro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2025
    Article
  12. Article
  13. Review
  14. Article
  15. Article
  16. Genomic signatures of hybridization betweenEcology and evolution · 2024
    Article
  17. Coinfection ofPathogens (Basel, Switzerland) · 2024
    Review
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

14 authors at 3 institutions in 2 countries.

Maija LaaksonenDepartment of Biology, University of Turku, Turku, Finland. makalaa@utu.fi.
Tero KlemolaDepartment of Biology, University of Turku, Turku, Finland.
Eeva FeuthInstitute of Biomedicine, University of Turku, Turku, Finland.
Jani J SormunenDepartment of Biology, University of Turku, Turku, Finland.
Anna PuistoDepartment of Biology, University of Turku, Turku, Finland.
Satu MäkeläDepartment of Biology, University of Turku, Turku, Finland.
Ritva PenttinenBiodiversity Unit, University of Turku, Turku, Finland.
Kai RuohomäkiDepartment of Biology, University of Turku, Turku, Finland.
Jari HänninenBiodiversity Unit, University of Turku, Turku, Finland.
Ilari E SääksjärviBiodiversity Unit, University of Turku, Turku, Finland.
Ilppo VuorinenBiodiversity Unit, University of Turku, Turku, Finland.
Hein SprongCentre for Infectious Disease Control, National Institute for Public Health and Environment (RIVM), Bilthoven, Netherlands.
Jukka HytönenInstitute of Biomedicine, University of Turku, Turku, Finland.
Eero J VesterinenBiodiversity Unit, University of Turku, Turku, Finland.
University of Turku · FINational Institute for Public Health and the Environment · NLUniversity of Helsinki · FI

Funding

Academy of Finland 292701Jenny ja Antti Wihurin Rahasto 00160203
6 · The paper itself

Abstract

backgroundAlmost 3500 tick samples, originally collected via a nationwide citizen science campaign in 2015, were screened to reveal the prevalence and distribution of a wide spectrum of established and putative tick-borne pathogens vectored by Ixodes ricinus and I. persulcatus in Finland. The unique geographical distribution of these two tick species in Finland allowed us to compare pathogen occurrence between an I. ricinus-dominated area (southern Finland), an I. persulcatus-dominated area (northern Finland), and a sympatric area (central Finland).

resultsOf the analysed ticks, almost 30% carried at least one pathogen and 2% carried more than one pathogen. A higher overall prevalence of tick-borne pathogens was observed in I. ricinus than in I. persulcatus: 30.0% (604/2014) versus 24.0% (348/1451), respectively. In addition, I. ricinus were more frequently co-infected than I. persulcatus: 2.4% (49/2014) versus 0.8% (12/1451), respectively. Causative agents of Lyme borreliosis, i.e. bacterial genospecies in Borrelia burgdorferi (sensu lato) group, were the most prevalent pathogens (overall 17%). "Candidatus Rickettsia tarasevichiae" was found for the first time in I. ricinus ticks and in Finnish ticks in general. Moreover, Babesia divergens, B. venatorum and "Candidatus Neoehrlichia mikurensis" were reported for the first time from the Finnish mainland.

conclusionsThe present study provides valuable information on the prevalence and geographical distribution of various tick-borne pathogens in I. ricinus and I. persulcatus ticks in Finland. Moreover, this comprehensive subset of ticks revealed the presence of rare and potentially dangerous pathogens. The highest prevalence of infected ticks was in the I. ricinus-dominated area in southern Finland, while the prevalence was essentially equal in sympatric and I. persulcatus-dominated areas. However, the highest infection rates for both species were in areas of their dominance, either in south or north Finland.

Indexed as

AnimalsArachnid VectorsFemaleFinlandHumansIxodesMalePrevalenceSympatryAnaplasmaBabesiaBorrelia burgdorferi“Candidatus Neoehrlichia mikurensis”DistributionIxodes persulcatusIxodes ricinusParapatricRickettsiaSympatric

Identifiers

PMID30355331
PMCPMC6201636
OpenAlexW2898361138

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.