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[Ryegrass cramps in horses]

G J van Essen1, M Blom, J Fink Gremmels-Gehrmann

  • 1Afdeling Veterinaire Farmacologie, Farmacie en Toxicologie, Faculteit der Diergeneeskunde, Universiteit Utrecht.

Tijdschrift Voor Diergeneeskunde
|December 15, 1995
PubMed
Summary

A stallion showed neurological signs like ataxia and incoordination. Diagnosis confirmed rye-grass staggers (RGS) syndrome due to mycotoxin lolitrem B in hay.

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Area of Science:

  • Veterinary Neurology
  • Toxicology
  • Equine Medicine

Background:

  • Rye-grass staggers (RGS) is a neurotoxic syndrome affecting livestock.
  • Diagnosis in horses often requires differentiating from other causes of ataxia.

Observation:

  • A stallion presented with ataxia and incoordination, indicative of a neurotoxic syndrome.
  • Standard blood chemistry and hematology tests did not reveal systemic or organ-specific lesions.

Findings:

  • Chemical analysis of the stallion's hay identified the mycotoxin lolitrem B.
  • Lolitrem B concentrations were consistent with those causing similar symptoms in other species.

Implications:

  • This case confirms lolitrem B as a causative agent of rye-grass staggers in horses.
  • Highlights the importance of mycotoxin analysis in diagnosing equine neurological disorders.
  • Informs veterinary practices on diagnosing and managing RGS in equine patients.

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