Bovine Ethylene Glycol Toxicity Study Guide
Overview and Clinical Importance
Ethylene glycol (EG) toxicosis is a rare but life-threatening condition in cattle caused by ingestion of antifreeze or contaminated feedstuffs. Although more commonly encountered in small animals, bovine cases occur through accidental exposure to automotive antifreeze, contaminated water sources, or adulterated feed products. The condition results in acute renal failure due to the formation of calcium oxalate crystals in renal tubules following hepatic metabolism of ethylene glycol to toxic metabolites.
Understanding the pathophysiology, clinical presentation, and treatment options is essential for veterinarians practicing in both dairy and beef cattle operations. Prompt recognition and early intervention are critical for survival, though prognosis remains guarded to poor once clinical signs develop.
Sources of Exposure
Ethylene glycol is a colorless, odorless, sweet-tasting liquid commonly found in automotive antifreeze (concentrations up to 95%), windshield deicer fluids, brake fluids, industrial solvents, and certain pharmaceutical preparations. In cattle, exposure typically occurs through:
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