Experimental selenium poisoning in Nubian goats

Area of Science:

• Veterinary Toxicology
• Animal Science
• Toxicology

Background:

• Sodium selenite is a common selenium source.
• Understanding its toxicity is crucial for animal health and welfare.
• Nubian goats are a relevant livestock model.

Purpose of the Study:

• To determine the toxic and non-toxic dose ranges of sodium selenite in Nubian goats.
• To characterize the clinical signs and pathological lesions associated with sodium selenite toxicity.

Main Methods:

• Administered single or repeated oral doses of sodium selenite (5-160 mg/kg) to Nubian goats.
• Observed clinical signs and performed necropsies to identify pathological lesions.
• Determined a non-toxic dose range through extended administration (0.25-1 mg/kg/d for 225 days).

Main Results:

• High doses (5-160 mg/kg) of sodium selenite caused significant toxicity and mortality in goats.
• Clinical signs included inappetence, dyspnea, diarrhea, paresis, and recumbency.
• Pathological findings included gastrointestinal hemorrhages, hepatic and renal necrosis, and pulmonary edema.

Conclusions:

• Sodium selenite exhibits dose-dependent toxicity in Nubian goats.
• Establishing safe dosage limits is essential to prevent adverse effects in this species.
• Further research into selenium metabolism and toxicity in goats is warranted.