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Home / Equine Research Bank / Vet Q / Comparison of the reappearance of strongyle eggs on foals, y...
The veterinary quarterly1996; 18(1); 7-9; doi: 10.1080/01652176.1996.9694602

Comparison of the reappearance of strongyle eggs on foals, yearlings and adult horses after treatment with ivermectin or pyrantel.

Abstract: The reappearance of strongyle eggs in faeces after treatment with ivermectin or pyrantel embonate was investigated in 22 foals, 36 yearlings, and 45 adult horses on five Dutch horse farms. The results confirmed earlier studies which showed an egg reappearance period of 9 and 6 weeks after ivermectin and pyrantel treatment, respectively. There were no differences between the egg reappearance periods of foals, yearlings, and adult horses. The mean egg counts of the yearlings were, however, consistently higher than the mean egg counts of the adult horses and foals in both ivermectin- and pyrantel-treated animals. It is concluded that shorter treatment intervals in foals and yearlings are not obligatory. However, longer intervals must be prevented in yearlings because their contribution to pasture contamination is relatively high.
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Publication Date: 1996-03-01 PubMed ID: 8833604DOI: 10.1080/01652176.1996.9694602Google Scholar: Lookup
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  • Comparative Study
  • 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.

This study observes the return of strongyle eggs in horse feces after treatment with either ivermectin or pyrantel embonate. No differences were found in the period of egg reappearance among foals, yearlings, and adult horses. Yet, yearlings had higher mean egg counts, implying they contribute more to the contamination of pastures.

Study Objectives and Methodology

  • The primary aim of the research was to understand the pattern of strongyle egg reappearance in horses of different ages – foals, yearlings, and adults, post-treatment with two commonly used drugs – ivermectin and pyrantel embonate.
  • The study involved 22 foals, 36 yearlings, and 45 adult horses across five horse farms in the Netherlands.

Findings

  • The study reinforced previous results that the period for strongyle egg reappearance after drug treatment is approximately nine weeks for ivermectin and six weeks for pyrantel embonate.
  • No significant differences were detected in the egg reappearance periods for foals, yearlings, or adult horses following treatment with either of the two drugs.
  • Even though the egg reappearance period remained homogeneous across the age groups, a striking difference was observed in the mean egg counts. The yearling horses had higher mean egg counts, meaning they are more prone to strongyle infection, leading to a greater potential of contaminating pastures.

Conclusions and Recommendations

  • Given the similarity in egg reappearance periods, the study suggests that shorter treatment intervals are not necessary for foals and yearlings compared to adults.
  • However, it emphasizes the necessity to prevent longer treatment intervals for yearlings due to their relatively higher contributions to pasture contamination.
  • These findings highlight the importance of targeted deworming strategies, taking into account both the age of the horse and the specific medication being used to control strongyle infections effectively.

Cite This Article

APA
Boersema JH, Eysker M, Maas J, van der Aar WM. (1996). Comparison of the reappearance of strongyle eggs on foals, yearlings and adult horses after treatment with ivermectin or pyrantel. Vet Q, 18(1), 7-9. https://doi.org/10.1080/01652176.1996.9694602

Publication

The veterinary quarterly
ISSN: 0165-2176
NlmUniqueID: 7909485
Country: England
Language: English
Volume: 18
Issue: 1
Pages: 7-9

Researcher Affiliations

Boersema, J H
  • Utrech University, Faculty of Veterinary Medicine, The Netherlands.
Eysker, M
    Maas, J
      van der Aar, W M

        MeSH Terms

        • Age Factors
        • Animals
        • Antinematodal Agents / therapeutic use
        • Feces / parasitology
        • Horses
        • Ivermectin / therapeutic use
        • Netherlands / epidemiology
        • Parasite Egg Count / veterinary
        • Pyrantel / therapeutic use
        • Strongyle Infections, Equine / drug therapy
        • Strongyle Infections, Equine / epidemiology
        • Strongylus / isolation & purification
        • Time Factors

        Citations

        This article has been cited 16 times.
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