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Grayanotoxin poisoning in three goats.

B Puschner1, D M Holstege, N Lamberski

  • 1California Animal Health and Food Safety Laboratory, School of Veterinary Medicine, University of California, Davis 95616, USA.

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Summary

Three Nubian goats experienced grayanotoxin poisoning after eating azalea. Diagnosis was confirmed using liquid chromatography-mass spectrometry, and goats recovered after supportive care for rhododendron toxicity.

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Area of Science:

  • Veterinary Toxicology
  • Animal Science

Background:

  • Rhododendron species, commonly known as azaleas, are known to contain toxic compounds called grayanotoxins.
  • Grayanotoxins can cause significant health issues in animals, affecting multiple organ systems.

Purpose of the Study:

  • To report a case of grayanotoxin poisoning in Nubian goats exposed to Rhododendron indica.
  • To highlight the diagnostic methods and successful treatment of rhododendron toxicity in goats.

Main Methods:

  • Six Nubian goats were exposed to an azalea branch.
  • Clinical signs were monitored, and affected goats received magnesium hydroxide, activated charcoal, and lactated Ringer's solution.
  • Urine and fecal samples were analyzed using liquid chromatography-mass spectrometry for definitive diagnosis.

Main Results:

  • Three of the six goats developed clinical signs including bloat, regurgitation, depression, head pressing, and muscle tremors.
  • All affected goats recovered within 24 hours following treatment.
  • Liquid chromatography-mass spectrometry confirmed grayanotoxin exposure.

Conclusions:

  • Grayanotoxin exposure from Rhododendron indica can cause severe clinical signs in goats.
  • Prompt diagnosis and supportive care are crucial for successful recovery from rhododendron poisoning.
  • Veterinarians should consider rhododendron toxicity in animals presenting with gastrointestinal, cardiac, and neurological signs.