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Parasitology research2005; 98(5); 496-500; doi: 10.1007/s00436-005-0091-x

Field studies on endoparasites of Thoroughbred foals on seven farms in central Kentucky in 2004.

Abstract: Fecal samples (n=1,584) for a parasite study were collected from Thoroughbred foals (n=349), 28 to 330 days old, on seven farms in central Kentucky during 49 monthly trips from May to October, November, or December 2004. The main purpose was to determine possible drug resistance of ascarids, also of strongyles, to ivermectin (IVM) and other commercially available compounds [fenbendazole, moxidectin (MOX), oxibendazole (OBZ), and pyrantel pamoate]. In addition, interest was on prevalence of foal parasites. Qualitative data were obtained by recording presence or absence of ascarid and strongyle eggs in feces from 7 to 25 days after treatment of some of the foals. None of the compounds completely eliminated ascarid eggs in feces of all foals posttreatment. Activity on ascarids was significantly the highest for OBZ and lowest for IVM. Activity on strongyles was significantly higher for IVM and MOX than for the other compounds. Prevalence (mean percentage of foals infected) was recorded for eggs of Parascaris equorum (39%), of strongyles (32%), and of Strongyloides westeri (2%) and oocysts of Eimeria leuckarti (28%) in feces of foals. One or more foals had infections of P. equorum on six farms (86%), strongyles on seven farms (100%), S. westeri on two farms (29%), and E. leuckarti on six farms (86%). The oldest foal infected with E. leuckarti was 301 days of age. Comparison was made on the prevalence of parasites in foals on five of the same farms in the 2004 study, which were part of a similar 14-farm project in 2003 (Lyons and Tolliver in Parasitol Res (2004) 92:400-404).
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Publication Date: 2005-12-30 PubMed ID: 16385405DOI: 10.1007/s00436-005-0091-xGoogle Scholar: Lookup
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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.

The research article covers a study on endoparasites in Thoroughbred foals carried out across seven farms in central Kentucky in 2004. Key parasitic species were identified and examined for potential drug resistance among commercially available compounds.

Study Design and Methodology

  • The study was conducted on seven farms, with fecal samples collected from 349 Thoroughbred foals aged between 28 to 330 days. The sampling process was carried out over 49 monthly trips from May to late December 2004.
  • The central goal was to assess potential drug resistance of ascarids and strongyles, two prevalent types of equine parasites, to ivermectin (IVM) and other commercially available compounds.
  • These additional compounds included fenbendazole, moxidectin (MOX), oxibendazole (OBZ), and pyrantel pamoate.

Key Observations

  • The researchers discovered that none of the tested compounds managed to entirely eliminate ascarid eggs from the feces of every treated foal.
  • Oxibendazole (OBZ) was notably the most effective against ascarids, while ivermectin (IVM) had the least impact.
  • For strongyles, ivermectin (IVM) and moxidectin (MOX) were found to perform significantly better than the other compounds.

Prevalence and Distribution of Parasites

  • The study also aimed to evaluate the overall prevalence of foal parasites.
  • The most prevalent parasite was Parascaris equorum, infecting 39% of the foals, followed by strongyles (32%), Eimeria leuckarti (28%), and Strongyloides westeri (2%).
  • These parasites were well distributed across the studied farms, with P. equorum and E. leuckarti identified on six farms (86%), strongyles on all seven farms, and S. westeri on two farms (29%).
  • The oldest foal found infected with E. leuckarti was 301 days old.

Comparison to Prior Studies

  • The study also made comparisons with a similar project undertaken in 2003, which focused on the prevalence of parasites in foals from 14 farms.
  • The selection for comparison included five of the same farms used in the current research.

Cite This Article

APA
Lyons ET, Tolliver SC, Collins SS. (2005). Field studies on endoparasites of Thoroughbred foals on seven farms in central Kentucky in 2004. Parasitol Res, 98(5), 496-500. https://doi.org/10.1007/s00436-005-0091-x

Publication

Parasitology research
ISSN: 0932-0113
NlmUniqueID: 8703571
Country: Germany
Language: English
Volume: 98
Issue: 5
Pages: 496-500

Researcher Affiliations

Lyons, E T
  • Department of Veterinary Science, Gluck Equine Research Center, University of Kentucky, Lexington, KY 40546-0099, USA. elyons1@uky.edu
Tolliver, S C
    Collins, S S

      MeSH Terms

      • Animals
      • Antiparasitic Agents / pharmacology
      • Antiparasitic Agents / therapeutic use
      • Ascaridoidea / drug effects
      • Ascaridoidea / isolation & purification
      • Ascaris / drug effects
      • Ascaris / isolation & purification
      • Drug Resistance
      • Eimeria / drug effects
      • Eimeria / isolation & purification
      • Feces / parasitology
      • Female
      • Horse Diseases / drug therapy
      • Horse Diseases / epidemiology
      • Horse Diseases / parasitology
      • Horses / parasitology
      • Kentucky / epidemiology
      • Male
      • Parasitic Diseases, Animal / drug therapy
      • Parasitic Diseases, Animal / epidemiology
      • Parasitic Diseases, Animal / parasitology
      • Prevalence
      • Strongylida / drug effects
      • Strongylida / isolation & purification

      References

      This article includes 14 references
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      Citations

      This article has been cited 11 times.
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