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

Fabri, Nannet and Sprong, Hein and Hofmeester, Tim and Heesterbeek, Hans and Donnars, Bjorn F. and Widemo, Fredrik and Ecke, Frauke and Cromsigt, Joris (2021). Wild ungulate species differ in their contribution to the transmission of Ixodes ricinus-borne pathogens. Parasites and Vectors. 14 , 360
[Research article]

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Abstract

Background Several 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. Methods We 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. Results Wild 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. Conclusions The 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. Graphic abstract

Authors/Creators:Fabri, Nannet and Sprong, Hein and Hofmeester, Tim and Heesterbeek, Hans and Donnars, Bjorn F. and Widemo, Fredrik and Ecke, Frauke and Cromsigt, Joris
Title:Wild ungulate species differ in their contribution to the transmission of Ixodes ricinus-borne pathogens
Series Name/Journal:Parasites and Vectors
Year of publishing :2021
Volume:14
Article number:360
Number of Pages:15
Associated Programs and Other Stakeholders:SLU - Research Areas for the Future > SLU Future Animals, Nature and Health
ISSN:1756-3305
Language:English
Publication Type:Research 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
Keywords:Anaplasma phagocytophilum, Borrelia burgdorferi (s.l.), Ixodes ricinus, Ungulate management, Zoonotic disease risk
URN:NBN:urn:nbn:se:slu:epsilon-p-112929
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112929
Additional ID:
Type of IDID
DOI10.1186/s13071-021-04860-w
Web of Science (WoS)000671621900001
ID Code:24973
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Wildlife, Fish and Environmental Studies
Deposited By: SLUpub Connector
Deposited On:20 Aug 2021 11:25
Metadata Last Modified:20 Aug 2021 11:31

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