Evidence map›Paper›PMID 41585008›Full record

ArticleCanadian journal of veterinary research = Revue canadienne de recherche veterinaire2026

Molecular prevalence of equine alphaherpesvirus-1 shedding in healthy broodmares in Ontario.

Carina J Cooper, Luis G Arroyo, Jutta D Hammermueller, Michaela M Botts, David L Pearl, Sarah K Wootton, Brandon N Lillie

Abstract read
PubMed Full text at PMC
In one paragraph

Article in Canadian journal of veterinary research = Revue canadienne de recherche veterinaire, 2026. 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

7 authors.

Carina J CooperCanadian Large Animal Specialty Services, Sherwood Park, Alberta T8H 0T7 (Cooper); Department of Clinical Studies (Arroyo), Department of Pathobiology (Hammermueller, Botts, Wootton, Lillie), and Department of Population Medicine (Pearl), Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1.
Luis G ArroyoCanadian Large Animal Specialty Services, Sherwood Park, Alberta T8H 0T7 (Cooper); Department of Clinical Studies (Arroyo), Department of Pathobiology (Hammermueller, Botts, Wootton, Lillie), and Department of Population Medicine (Pearl), Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1.
Jutta D HammermuellerCanadian Large Animal Specialty Services, Sherwood Park, Alberta T8H 0T7 (Cooper); Department of Clinical Studies (Arroyo), Department of Pathobiology (Hammermueller, Botts, Wootton, Lillie), and Department of Population Medicine (Pearl), Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1.
Michaela M BottsCanadian Large Animal Specialty Services, Sherwood Park, Alberta T8H 0T7 (Cooper); Department of Clinical Studies (Arroyo), Department of Pathobiology (Hammermueller, Botts, Wootton, Lillie), and Department of Population Medicine (Pearl), Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1.
David L PearlCanadian Large Animal Specialty Services, Sherwood Park, Alberta T8H 0T7 (Cooper); Department of Clinical Studies (Arroyo), Department of Pathobiology (Hammermueller, Botts, Wootton, Lillie), and Department of Population Medicine (Pearl), Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1.
Sarah K WoottonCanadian Large Animal Specialty Services, Sherwood Park, Alberta T8H 0T7 (Cooper); Department of Clinical Studies (Arroyo), Department of Pathobiology (Hammermueller, Botts, Wootton, Lillie), and Department of Population Medicine (Pearl), Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1.
Brandon N LillieCanadian Large Animal Specialty Services, Sherwood Park, Alberta T8H 0T7 (Cooper); Department of Clinical Studies (Arroyo), Department of Pathobiology (Hammermueller, Botts, Wootton, Lillie), and Department of Population Medicine (Pearl), Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Equine herpesvirus-1 (EHV-1) is ubiquitous in the horse population, but prevalence estimates have ranged from 3 to 88% depending on the population and method of sampling. No prevalence studies have been carried out in Ontario, Canada. The objective of this study was to measure the prevalence of EHV-1 shedding in healthy broodmares in Ontario. A total of 381 mares from 42 farms in Ontario were sampled, including pregnant and barren broodmares. Samples were collected from the nose, vagina, and blood of each mare up to 6 times from December 2016 through October 2017 using a cross-sectional study design. The EHV-1 glycoprotein B (gB) copy number was measured using droplet digital polymerase chain reaction (ddPCR). A survey was completed at time of sampling regarding signalment, pregnancy status, and vaccination. Overall, 85% of the mares sampled were positive for EHV-1 from at least one site, on at least one occasion. Samples were positive 8.1%, 15.8%, and 17.2% of the time from the nose, vagina, and white blood cells, respectively. Pregnant mares had increased odds of shedding virus from the nose [odds ratio (OR) = 1.50, 95% confidence interval (CI): 1.03 to 2.18,

Indexed as

Herpesviridae InfectionsHerpesvirus 1, EquidHorse DiseasesVirus SheddingAnimalsCross-Sectional StudiesFemaleHorsesOntarioPregnancyPrevalenceVagina

Identifiers

PMID41585008
PMCPMC12825682

What OpenQuestion holds

Textmetadata
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.