Heavy Metal Toxicosis

TL;DR. Life-threatening lead or zinc poisoning in birds, dogs, cats, rabbits, and horses; needs urgent diagnosis and chelation therapy.

Birds are highly susceptible from household metals and cages.

Wat is het?

Ingested lead or zinc is absorbed and damages brain, kidneys, liver, gut, and red blood cells. Signs are non-specific, so history and imaging/blood metal levels are critical. Birds are classic patients from cages and household metals.

Oorzaken en risicofactoren

Lead: old paint, solder, foil, sinkers, batteries. Zinc: post-1982 US pennies, galvanized wire/cages, zippers, some ointments. Curious chewers and free-roaming birds are high risk.

Signalen

• Paresis, lethargy, seizures (common)
• Pale mucous membranes from anemia (common)
• PU/PD; anorexia; regurgitation/vomiting (common)
• Bloody stool/urine; green diarrhea in birds (common)

Radiographs help find metallic objects in the gut.

Diagnostiek

Radiographs for metallic foreign bodies; blood lead level; serum zinc in proper trace-element tubes. Clean radiographs do not fully exclude dissolved metal already absorbed.

Behandeling

Remove remaining metal when appropriate. Chelation: injectable Edetate Calcium Disodium, oral Succimer, sometimes Penicillamine. Support with fluids, seizure control, GI protection, nutrition. Maintain hydration during chelation.

Prognose

Favorable if source removed early before severe kidney failure or uncontrollable seizures; guarded to poor with advanced neurologic or renal injury.

Preventie

Remove pennies, lead weights, and unsafe galvanized materials. Use bird-safe caging. Store metals and ointments out of reach.

Wanneer de dierenarts bellen

Any suspected metal ingestion or sudden neurologic/GI signs after possible exposure: emergency vet now.

Bronnen

• Plumb's Veterinary Drug Handbook chelation guidance as in the English master article.

My highlights & notes

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