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Home / Equine Research Bank / J Parasitol / Prevalence of strongyle nematodes in naturally infected poni...
The Journal of parasitology2003; 89(2); 309-314; doi: 10.1645/0022-3395(2003)089[0309:POSNIN]2.0.CO;2

Prevalence of strongyle nematodes in naturally infected ponies of different ages and during different seasons of the year in Louisiana.

Abstract: One hundred and seventeen ponies were surveyed for the seasonal prevalence of strongyloid parasites, particularly cyathostomes, and for host- and age-related differences in these infections. For 56 ponies, all stages of the cyathostome life cycle, both mucosal and luminal, were enumerated. Total numbers of cyathostomes and percentage of developing larvae (DL) encysted in the mucosa remained constant in all 4 seasons of the year, whereas a significant increase in the percentage of adults in the cyathostome population occurred in fall. In yearling ponies, encysted early third-stage larvae constituted a significantly lower percentage of the cyathostome population, and DL and adults formed a significantly higher percentage, compared with those stages in older ponies, 2-5 yr of age. More species of cyathostomes were present in yearling ponies than in older ponies. Significant differences occurred in fecal egg counts at different seasons of the year, even though adult cyathostome and large strongyle numbers remained constant. Twenty-four species of cyathostomes were found year-round, and 2 rare species were found in only 2 or 3 seasons of the year. Prevalences for these 24 species were not significantly different during any season, although 5 species had significant differences in intensity levels of infection in certain seasons of the year. Three species of large strongyle (strongylinae) adults had significant seasonal variations in intensities. These were Strongylus edentatus and S. vulgaris, which occurred in significantly higher numbers in summer and fall, and Triodontophorus brevicauda, which was more numerous in spring and summer. Fourth- and fifth-stage larvae of S. vulgaris recovered from the mesenteric vasculature were significantly more numerous in winter and spring than in other seasons.
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Publication Date: 2003-05-23 PubMed ID: 12760645DOI: 10.1645/0022-3395(2003)089[0309:POSNIN]2.0.CO;2Google 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.

This research article discusses a study on the prevalence of strongyle nematode infections in ponies in Louisiana, examining variations in infection rates related to the animals’ ages and seasons.

Study Design and Methodology

  • The study surveyed 117 ponies to understand the prevalence of strongyloid parasites, with emphasis on cyathostomes, during different seasons.
  • Fifty-six ponies were studied thoroughly to enumerate all stages of cyathostome life cycles, both in the mucosa and the lumen.
  • Variations in parasitic life stages, presence of different species, and their abundance were compared between yearlings and older ponies (2-5 years old).
  • Fecal egg counts were utilized as an index of infection for large strongyles and cyathostomes.
  • Seasonal prevalence and intensity variations of 24 species of cyathostomes and 3 species of large strongyles (Strongylinae) were studied.

Research Findings

  • The number of cyathostomes and the percentage of encysted larvae in the mucosa remained constant throughout the year.
  • However, a significant increase in the percentage of mature cyathostomes was observed during fall.
  • In yearling ponies, the proportions of larvae and adult parasites were significantly greater than older ponies, while the percentage of early-stage larvae was lower than in older ponies.
  • There were more species of cyathostomes identified in yearling ponies than in older ones.
  • Faecal egg counts varied significantly during different seasons, despite the constant adult cyathostome and large strongyle numbers.
  • Three species of large strongyles, being Strongylus edentatus, S. vulgaris and Triodontophorus brevicauda, exhibited seasonal fluctuations in intensity of infections.
  • The S. vulgaris larvae were more prevalent during winter and spring than other seasons.

Implications of Research

  • The study provides valuable insights into the occurrence and the trends of parasite prevalence and infestation intensity in the studied group of ponies.
  • This information may help in creating more effective and stategic deworming schedules and practices, potentially highlighting the importance of looking at age and seasonality when addressing parasite-related issues in equine health management.

Cite This Article

APA
Chapman MR, French DD, Klei TR. (2003). Prevalence of strongyle nematodes in naturally infected ponies of different ages and during different seasons of the year in Louisiana. J Parasitol, 89(2), 309-314. https://doi.org/10.1645/0022-3395(2003)089[0309:POSNIN]2.0.CO;2

Publication

The Journal of parasitology
ISSN: 0022-3395
NlmUniqueID: 7803124
Country: United States
Language: English
Volume: 89
Issue: 2
Pages: 309-314

Researcher Affiliations

Chapman, Melanie R
  • Department of Veterinary Science, Louisiana Agricultural Experiment Station, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
French, Dennis D
    Klei, Thomas R

      MeSH Terms

      • Age Factors
      • Animals
      • Feces / parasitology
      • Female
      • Horses
      • Louisiana / epidemiology
      • Male
      • Parasite Egg Count / veterinary
      • Prevalence
      • Seasons
      • Strongyle Infections, Equine / epidemiology
      • Strongyle Infections, Equine / parasitology

      Citations

      This article has been cited 11 times.
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        doi: 10.1186/1756-3305-2-S2-S7pubmed: 19778468google scholar: lookup
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