Evidence map›Paper›PMID 34246293›Full record

ArticleParasites & vectors2021

Wild ungulate species differ in their contribution to the transmission of Ixodes ricinus-borne pathogens.

Nannet D Fabri, Hein Sprong, Tim R Hofmeester, Hans Heesterbeek, Björn F Donnars, Fredrik Widemo, Frauke Ecke, Joris P G M Cromsigt

Abstract read
In one paragraph

Article in Parasites & vectors, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

30 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. A Systematic Review on the Occurrence ofPathogens (Basel, Switzerland) · 2025
    Pooled it
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  9. Silent Spread ofHealthcare (Basel, Switzerland) · 2025
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  11. Detection ofAnimals : an open access journal from MDPI · 2025
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  12. Review of Molecular Tools Used in Diagnosis ofAnimals : an open access journal from MDPI · 2025
    Review
  13. Dynamics ofApplied and environmental microbiology · 2025
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  14. Review
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  16. Article
  17. Current research in parasitology & vector-borne diseases · 2025
    Article
  18. Article
  19. Risk ofPathogens (Basel, Switzerland) · 2024
    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

8 authors.

Nannet D FabriDepartment of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden. nannet.fabri@slu.se.
Hein SprongCentre for Infectious Disease Control, National Institute for Public Health and the Environment, Antonie Van Leeuwenhoeklaan 9, 3721 MA, Bilthoven, The Netherlands.
Tim R HofmeesterDepartment of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden.
Hans HeesterbeekDepartment of Population Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 7, 3584 CL, Utrecht, The Netherlands.
Björn F DonnarsDepartment of Population Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 7, 3584 CL, Utrecht, The Netherlands.
Fredrik WidemoDepartment of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden.
Frauke EckeDepartment of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden.
Joris P G M CromsigtDepartment of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden.

Funding

Gates Foundation INV-001337
6 · The paper itself

Abstract

backgroundSeveral ungulate species are feeding and propagation hosts for the tick Ixodes ricinus as well as hosts to a wide range of zoonotic pathogens. Here, we focus on Anaplasma phagocytophilum and Borrelia burgdorferi (s.l.), two important pathogens for which ungulates are amplifying and dilution hosts, respectively. Ungulate management is one of the main tools to mitigate human health risks associated with these tick-borne pathogens. Across Europe, different species of ungulates are expanding their ranges and increasing in numbers. It is currently unclear if and how the relative contribution to the life-cycle of I. ricinus and the transmission cycles of tick-borne pathogens differ among these species. In this study, we aimed to identify these relative contributions for five European ungulate species.

methodsWe quantified the tick load and collected ticks and spleen samples from hunted fallow deer (Dama dama, n = 131), moose (Alces alces, n = 15), red deer (Cervus elaphus, n = 61), roe deer (Capreolus capreolus, n = 30) and wild boar (Sus scrofa, n = 87) in south-central Sweden. We investigated the presence of tick-borne pathogens in ticks and spleen samples using real-time PCR. We determined if ungulate species differed in tick load (prevalence and intensity) and in infection prevalence in their tissue as well as in the ticks feeding on them.

resultsWild boar hosted fewer adult female ticks than any of the deer species, indicating that deer are more important as propagation hosts. Among the deer species, moose had the lowest number of female ticks, while there was no difference among the other deer species. Given the low number of infected nymphs, the relative contribution of all ungulate species to the transmission of B. burgdorferi (s.l.) was low. Fallow deer, red deer and roe deer contributed more to the transmission of A. phagocytophilum than wild boar.

conclusionsThe ungulate species clearly differed in their role as a propagation host and in the transmission of B. burgdorferi and A. phagocytophilum. This study provides crucial information for ungulate management as a tool to mitigate zoonotic disease risk and argues for adapting management approaches to the local ungulate species composition and the pathogen(s) of concern.

Indexed as

Anaplasma phagocytophilumAnimalsAnimals, WildBorrelia burgdorferiDeerDisease ReservoirsEhrlichiosisFemaleIxodesLyme DiseaseMaleTick InfestationsZoonosesAnaplasma phagocytophilumBorrelia burgdorferi (s.l.)Ixodes ricinusUngulate managementZoonotic disease risk

Identifiers

PMID34246293
PMCPMC8272276

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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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.