Evidence map›Paper›PMID 39865332›Full record

ArticleMedical and veterinary entomology2025

Spatial and temporal analyses of Dermacentor variabilis (Say) (Acari: Ixodidae) in central and eastern Canada.

Grace K Nichol, J Scott Weese, Shaun J Dergousoff, Amy L Greer, Katie M Clow

Abstract read
In one paragraph

Article in Medical and veterinary entomology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–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

1 citing paper in PubMed.

  1. 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

5 authors.

Grace K NicholDepartment of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada.ORCID 0009-0003-0702-3096
J Scott WeeseDepartment of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada.
Shaun J DergousoffLethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada.ORCID 0000-0002-4865-6370
Amy L GreerDepartment of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada.
Katie M ClowDepartment of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Dermacentor variabilis (Say) (Acari: Ixodidae) is a vector for pathogens that can impact human and animal health. The geographic range of this species is expanding, but there are some areas with limited up-to-date information on the distribution of D. variabilis. Therefore, the objective of this study was to describe the spatial and temporal patterns of adult D. variabilis activity in central and eastern Canada. Ticks were collected from companion animals by veterinary clinic staff. Suspected locations of tick acquisition were spatially projected, and a spatial scan statistic was used to identify statistically significant clusters of frequent submissions from veterinary clinics. Submissions were categorised by calendar week to evaluate temporal trends. In total, 1198 adult D. variabilis, one nymphal D. variabilis and one Dermacentor albipictus (Packard) were collected from the provinces of Manitoba, Ontario, Quebec, New Brunswick, Nova Scotia and Prince Edward Island from April 2019 through March 2020. Peaks in adult D. variabilis submissions occurred in May and June. Most of the submissions were received from south-eastern Manitoba, eastern Ontario and central and western Nova Scotia. A statistically significant cluster of frequent submissions that included seven veterinary clinics was identified in Nova Scotia. These findings can be used to determine the locations and times at which humans and their companion animals should be considered at an increased risk of exposure to D. variabilis and the pathogens they carry.

Indexed as

Animal DistributionDermacentorTick InfestationsAnimalsCanadaFemaleNymphSpatio-Temporal AnalysisCanadacompanion animalsDermacentor variabilisscan statistictemporal analysis

Identifiers

PMID39865332
PMCPMC12323746

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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.