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Home / Equine Research Bank / Equine Vet J / Farm size and biosecurity measures associated with Strongylu...
Equine veterinary journal2024; 57(3); 703-711; doi: 10.1111/evj.14212

Farm size and biosecurity measures associated with Strongylus vulgaris infection in horses.

Abstract: Selective anthelmintic treatment, advocated due to evolving anthelmintic resistance, has been associated with an increase in Strongylus vulgaris prevalence. Reverting to routine interval anthelmintic treatments is not viable and therefore, identifying other management factors correlated with S. vulgaris infection is vital. Objective: To investigate possible risk factors associated with the presence of S. vulgaris infection in resident horses on Swedish horse establishments. Methods: Internet-based questionnaire survey. Methods: A questionnaire, created using the internet-based survey platform Netigate, was distributed to owners of equine establishments throughout Sweden via established equine platforms and social media channels. The survey was available for response from 21 May until 1 September 2022. Questions were closed ended with branching logic paths. Results: Four factors were significantly associated with S. vulgaris infection, with an increased odds of infection seen in livery yards (odds ratio [OR] 1.67, 95% confidence interval [CI] 1.18-2.36, p = 0.004) and premises with more than 10 resident horses (OR 2.42, 95% CI 1.64-3.56, p < 0.001). A lower odds of infection were seen in establishments using quarantine routines (OR 0.69, 95% CI 0.50-0.96, p = 0.03) and anthelmintic treatment of new horses prior to arrival at the premise (OR 0.37, 95% CI 0.18-0.74, p = 0.005). Conclusions: Due to the presence of S. vulgaris infection in the present study being based on S. vulgaris diagnostics performed at the farm level, any association between faecal diagnostic use and risk of infection could not be investigated. Conclusions: Although the use of diagnostics for S. vulgaris can keep infection rates low, large farms or livery yards with many different horse owners, and those with low use of biosecurity measures as regards to new horses arriving at the premise, are associated with a higher risk of infection.
© 2024 The Author(s). Equine Veterinary Journal published by John Wiley & Sons Ltd on behalf of EVJ Ltd.
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Publication Date: 2024-08-22 PubMed ID: 39171858PubMed Central: PMC11982428DOI: 10.1111/evj.14212Google Scholar: Lookup
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  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

Overview

  • This study examined the factors associated with Strongylus vulgaris infection in horses at Swedish equine establishments.
  • It identified that larger farms, livery yards, and poor biosecurity measures increased infection risk, while quarantine and pre-arrival treatment reduced it.

Background

  • Strongylus vulgaris is a parasitic worm infecting horses, which can cause serious health problems.
  • Due to increasing resistance to anthelmintic drugs (dewormers), selective treatment strategies are used rather than routine treatments.
  • However, selective treatments have been linked to increased prevalence of S. vulgaris, raising concerns about infection control.
  • Improving management practices and identifying risk factors beyond drug treatment are necessary for controlling infections.

Objective

  • To identify risk factors related to the presence of S. vulgaris infection in horses residing on Swedish horse farms.

Methods

  • Researchers designed an internet-based questionnaire using the Netigate platform.
  • The survey targeted owners of horse establishments across Sweden.
  • Distribution occurred through equine industry platforms and social media channels, collecting responses from 21 May to 1 September 2022.
  • Questions were mostly closed-ended with branching logic to follow relevant paths based on responses.
  • The questionnaire collected data on farm characteristics, biosecurity, deworming practices, and presence of S. vulgaris infection.

Key Findings

  • Four significant factors were associated with S. vulgaris infection risk:
  • Higher risk factors:
    • Livery yards: Premises where horses are housed on a livery basis showed a 1.67 times higher odds of infection.
    • Premises with >10 resident horses: Large farms with more than 10 horses had 2.42 times increased odds of infection.
  • Protective factors:
    • Use of quarantine procedures: Establishments practicing quarantine on incoming horses had 31% lower odds of infection.
    • Anthelmintic treatment of new arrivals prior to arrival: Premises treating new horses before arrival had 63% lower odds of infection.

Interpretation

  • The findings suggest that biosecurity measures such as quarantine and pre-arrival treatment are effective in reducing transmission of S. vulgaris.
  • Larger horse populations and livery yards likely increase infection risk due to more animal-to-animal contact and varied horse ownership.
  • While diagnostics for detecting S. vulgaris can help control infection, this study was unable to assess the impact of diagnostic use at the farm level because infection status was determined from farm-level diagnostics only.

Conclusions and Implications

  • Routine anthelmintic treatment is not a sustainable solution due to resistance issues, so management and biosecurity practices are critical to infection control.
  • Horse farms with more than 10 animals or operating as livery yards should be especially vigilant in implementing quarantine and pre-arrival treatments.
  • Education and awareness to improve biosecurity among horse owners can reduce the prevalence of S. vulgaris.
  • Future research could explore how diagnostic testing at individual horse levels influences infection risk and treatment effectiveness.

Cite This Article

APA
Hedberg Alm Y, Tydén E, Martin F, Lernå J, Halvarsson P. (2024). Farm size and biosecurity measures associated with Strongylus vulgaris infection in horses. Equine Vet J, 57(3), 703-711. https://doi.org/10.1111/evj.14212

Publication

Equine veterinary journal
ISSN: 2042-3306
NlmUniqueID: 0173320
Country: United States
Language: English
Volume: 57
Issue: 3
Pages: 703-711

Researcher Affiliations

Hedberg Alm, Ylva
  • Department of Animal Biosciences, Parasitology Unit, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Tydén, Eva
  • Department of Animal Biosciences, Parasitology Unit, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Martin, Frida
  • Department of Animal Biosciences, Parasitology Unit, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Lernå, Jessica
  • Department of Animal Biosciences, Parasitology Unit, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Halvarsson, Peter
  • Department of Animal Biosciences, Parasitology Unit, Swedish University of Agricultural Sciences, Uppsala, Sweden.

MeSH Terms

  • Animals
  • Horses
  • Animal Husbandry / methods
  • Strongylus
  • Surveys and Questionnaires
  • Sweden / epidemiology
  • Risk Factors
  • Horse Diseases / epidemiology
  • Horse Diseases / parasitology
  • Horse Diseases / prevention & control
  • Biosecurity
  • Strongyle Infections, Equine / epidemiology
  • Strongyle Infections, Equine / parasitology
  • Strongyle Infections, Equine / prevention & control
  • Farms

Grant Funding

  • H-15-47-097 / The Foundation for Swedish and Norwegian Equine Research

Conflict of Interest Statement

The authors have declared no conflicting interests.

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Citations

This article has been cited 1 times.
  1. Lu Y, Ru P, Qin S, Zhang Y, Fu E, Cai M, Tuohuti N, Wu H, Zhang Y, Zhang Y. Epidemiological Patterns of Gastrointestinal Parasitic Infections in Equine Populations from Urumqi and Ili, Xinjiang, China.. Vet Sci 2025 Jul 6;12(7).
    doi: 10.3390/vetsci12070644pubmed: 40711304google scholar: lookup
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