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Related Experiment Videos

English yew poisoning in 43 cattle

K E Panter1, R J Molyneux, R A Smart

  • 1USDA Agricultural Research Service (ARS) Poisonous Plant Research Lab, Logan, UT 84321.

Journal of the American Veterinary Medical Association
|May 1, 1993
PubMed
Summary

Accidental ingestion of English yew (Taxus baccata) caused rapid death in cattle. Analysis confirmed the presence of taxol in the rumen, identifying the toxic agent responsible for the poisoning.

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Area of Science:

  • Veterinary Toxicology
  • Ruminant Pathology
  • Plant Poisoning

Background:

  • English yew (Taxus baccata) is a known toxic plant for livestock.
  • Accidental poisoning incidents require prompt identification of the toxic agent and pathological findings.

Purpose of the Study:

  • To investigate the cause of death in cattle following suspected English yew ingestion.
  • To identify toxic compounds and pathological changes associated with Taxus baccata poisoning in cattle.

Main Methods:

  • Clinical observation of affected cattle.
  • Necropsy and histopathological examination of deceased animals.
  • Chemical analysis (thin-layer chromatography) of rumen contents for taxol.

Main Results:

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  • Thirty-five cattle died after ingesting an estimated 0.36–0.70 g/kg of English yew.
  • Clinical signs and death occurred within 2–8 hours post-ingestion.
  • Necropsy revealed yew leaves in the rumen, abomasal/intestinal hyperemia, and pulmonary congestion/edema.
  • Chemical analysis confirmed the presence of taxol in rumen samples.

Conclusions:

  • Accidental English yew ingestion is acutely fatal to cattle.
  • Taxol is the likely toxic compound responsible for the observed poisoning.
  • Pulmonary edema and congestion are key histopathological findings in yew poisoning.