SympatricIxodes triangulicepsandIxodes ricinusTicks Feeding on Field Voles (Microtus agrestis): Potential for Increased Risk ofAnaplasma phagocytophilumin the United Kingdom?
- 1 December 2006
- journal article
- research article
- Published by Mary Ann Liebert Inc in Vector-Borne and Zoonotic Diseases
- Vol. 6 (4), 404-410
- https://doi.org/10.1089/vbz.2006.6.404
Abstract
The importance of wild rodents as reservoirs of zoonotic tick-borne pathogens is considered low in the United Kingdom because, in studies to date, those parasitized by exophilic Ixodes ricinus ticks carry almost exclusively larvae and thus have a minor role in transmission cycles. In a cross-sectional study, 11 (6.7%) of 163 field voles (Microtus agrestis) captured at field sites in Northern England were PCR-positive for Anaplasma phagocytophilum. The voles were found to act as hosts for both larval and nymphal I. ricinus and all stages of the nidicolous tick I. trianguliceps, and eight individuals were infested with ticks of both species at the same time. Two of 158 larval and one of 13 nymphal I. ricinus, as well as one of 14 larval and one of 15 nymphal I. trianguliceps collected from the rodents were PCR-positive. These findings suggest that habitats where field voles are abundant in the United Kingdom may pose a risk of A. phagocytophilum infection because (i) field voles, the most abundant terrestrial mammal in the United Kingdom, may be a competent reservoir; (ii) the field voles are hosts for both nymphal and larval ixodid ticks so they could support endemic cycles of A. phagocytophilum; and (iii) they are hosts for nidicolous I. trianguliceps, which may alone maintain endemic cycles, and exophilic I. ricinus ticks, which could act as a bridge vector and transmit infections to humans and domesticated animals.Keywords
This publication has 28 references indexed in Scilit:
- Groupings of highly similar major surface protein (p44)-encoding paralogues: a potential index of genetic diversity amongst isolates of Anaplasma phagocytophilumMicrobiology, 2004
- Seasonal Dynamics ofAnaplasmaphagocytophilain a Rodent-Tick (Ixodes trianguliceps) System, United KingdomEmerging Infectious Diseases, 2003
- Transmission Studies of Babesia microti in Ixodes ricinus Ticks and GerbilsJournal of Clinical Microbiology, 2002
- Natural Ehrlichia phagocytophila transmission coefficients from sheep ‘carriers’ to Ixodes ricinus ticks vary with the numbers of feeding ticksParasitology, 2002
- Scale invariant spatio-temporal patterns of field vole densityJournal of Animal Ecology, 2001
- Diet of tawny owls (Strix aluco) in relation to field vole (Microtus agrestis) abundance in a conifer forest in northern EnglandJournal of Zoology, 1999
- GranulocyticEhrlichiainfection in Ixodid ticks and mammals in woodlands and uplands of the U.K.Medical and Veterinary Entomology, 1998
- Borrelia burgdorferi sensu lato in Russia and neighbouring countries: high incidence of mixed isolatesResearch in Microbiology, 1997
- Lyme Disease in California: a Novel Enzootic Transmission Cycle of Borrelia burgdorferiScience, 1992
- Seasonal Dynamics of a Host-Parasite System: Ixodes trianguliceps (Acarina: Ixodidae) and its Small Mammal HostsJournal of Animal Ecology, 1975