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Antiparasitic effectiveness of ivermectin in the horse.

Abstract: By way of a controlled trial, the anthelmintic efficacies of the injectable and paste formulations of ivermectin were evaluated in the horse. Treatment was given at the rate of 200 microgram/kg of body weight. Regardless of formulation, 100% removals were demonstrated for Strongylus vulgaris (intestinal), S edentatus, 2nd and 3rd instars of Gastrophilus nasalis and G intestinalis, "small strongyles," Triodontophorus serratus and T tenuicollis. Adult Cylicocyclus insigne populations were eliminated at the rates of 99.9% and 96.3% by the injectable and paste formulations, respectively. Levels of 4th-stage Cylicocyclus spp larvae, as detected in the luminal contents of the colon, were reduced by 88.3% and 33.2% by the injectable and paste formulations, respectively. There were no adverse tissue or behavioral reactions induced by either preparation of ivermectin.
Publication Date: 1982-06-01 PubMed ID: 6896610
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  • Journal Article
  • Research Support
  • Non-U.S. Gov't

Summary

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The research article evaluates the effectiveness of the drug ivermectin, in both injectable and paste forms, in eliminating various parasites in horses. According to the controlled trial, both formulations were effective with no adverse effects observed.

Research Methodology and Objective

  • The study is a controlled trial primarily intended to evaluate the effectiveness of two different forms of ivermectin—a widely used anthelmintic (anti-parasitic) drug—against various parasites in horses.
  • The ivermectin was administered in two forms: injectable formulation and paste formulation.
  • The rate of the treatment was 200 micrograms of the drug per kilogram of the horse’s body weight.

Findings of the Experiment

  • Both forms of ivermectin, independent of their formulation, successfully demonstrated 100% removal of several parasites, including Strongylus vulgaris, S edentatus, 2nd and 3rd instars of Gastrophilus nasalis and G intestinalis, “small strongyles,” Triodontophorus serratus and T tenuicollis.
  • The adult populations of Cylicocyclus insigne, a specific type of intestinal worm, were eliminated at the rate of 99.9% by the injectable formulation and 96.3% by the paste formulation.
  • Moreover, 4th-stage Cylicocyclus spp larvae, identified in the luminal contents of the colon, were reduced by 88.3% by the injectable formulation and by 33.2% by the paste formulation.

Safety Observations

  • Through the course of the controlled trial, the researchers observed no adverse tissue reactions or behavioral changes in the horses as a result of either preparation of ivermectin. This speaks to the non-toxic nature of the drug and its suitability for equine use.

Conclusion

  • This research underscores the efficacy of ivermectin in fighting parasitic infections in horses, showcasing its effectiveness in both peptic and injectable forms. It also confirmed that the use of the drug did not induce any negative tissue or behavioral consequences, rendering it safe for use.

Cite This Article

APA
Yazwinski TA, Hamm D, Greenway T, Tilley W. (1982). Antiparasitic effectiveness of ivermectin in the horse. Am J Vet Res, 43(6), 1092-1094.

Publication

ISSN: 0002-9645
NlmUniqueID: 0375011
Country: United States
Language: English
Volume: 43
Issue: 6
Pages: 1092-1094

Researcher Affiliations

Yazwinski, T A
    Hamm, D
      Greenway, T
        Tilley, W

          MeSH Terms

          • Animals
          • Anthelmintics / administration & dosage
          • Anthelmintics / therapeutic use
          • Helminthiasis / drug therapy
          • Helminthiasis / parasitology
          • Helminthiasis, Animal
          • Horse Diseases / drug therapy
          • Horse Diseases / parasitology
          • Horses
          • Intestines / parasitology
          • Ivermectin
          • Lactones / administration & dosage
          • Lactones / therapeutic use

          Citations

          This article has been cited 2 times.
          1. Dong Z, Xing SY, Zhang JY, Zhou XZ. 14-Day Repeated Intraperitoneal Toxicity Test of Ivermectin Microemulsion Injection in Wistar Rats. Front Vet Sci 2020;7:598313.
            doi: 10.3389/fvets.2020.598313pubmed: 33392292google scholar: lookup
          2. Barragry TB. A review of the pharmacology and clinical uses of ivermectin. Can Vet J 1987 Aug;28(8):512-7.
            pubmed: 17422843