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Related Experiment Videos

Strongyloidiasis in a Cope's grey tree frog (Hyla chrysoscelis).

J C Patterson-Kane1, R P Eckerlin, E T Lyons

  • 1Livestock Disease Diagnostic Center, Department of Veterinary Science, University of Kentucky, 1429 Newtown Pike, Lexington, Kentucky 40511-1280, USA.

Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians
|June 7, 2003
PubMed
Summary

A Cope's grey tree frog died from an intestinal nematode infection. This study identifies Strongyloides sp. nematodes as a cause of death in frogs, highlighting a new parasitic threat.

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Area of Science:

  • Veterinary Pathology
  • Parasitology
  • Amphibian Biology

Background:

  • Cope's grey tree frog (Hyla chrysoscelis) is a common North American amphibian.
  • Spontaneous mortality events in amphibians can have various etiologies.
  • Gastrointestinal parasites are known pathogens in ectothermic vertebrates.

Observation:

  • A male Cope's grey tree frog presented with spontaneous death and ventral subcutaneous edema.
  • Necropsy revealed thickened intestinal mucosa with villous atrophy.
  • Intraepithelial nematodes were identified histopathologically.

Findings:

  • Adult female nematodes of the genus Strongyloides were successfully isolated from the frog's intestine.
  • This represents the first documented recovery of Strongyloides sp. from the Hyla genus.

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  • The identified nematodes are consistent with intestinal strongyloidiasis.

    • Implications:

    • Intestinal strongyloidiasis is a potential cause of severe morbidity and mortality in frogs.
    • This finding suggests a need to consider Strongyloides as a differential diagnosis for enteritis and protein-losing enteropathy in amphibians.
    • Further research into amphibian-nematode interactions and host-parasite dynamics is warranted.