To determine the clinical effect of systemic carboplatin administration in birds, 6 sulphur-crested cockatoos (Cacatua galerita) were anesthetized and infused intravenously or intraosseously with carboplatin at 5 mg/kg over 3 minutes. Four birds were euthanatized 96 hours after infusion and 2 birds given an intravenous dose were euthanatized 21 days after dosing. All birds tolerated the anesthesia and carboplatin infusion and recovered uneventfully. At 24 hours after dosing, all birds were bright and active. Within 12 hours of dosing, feed intake was reduced and 3 birds vomited, but these signs abated by 48 hours after dosing. Mean body weight decreased by 4% at 24 hours after dosing and continued to decrease, but not significantly, until 96 hours after dosing. Changes in packed cell volume (PCV) and plasma total solids reflected blood loss caused by sampling. The mean PCV decreased significantly by 6 hours after dosing, and the concentration of plasma total solids decreased significantly at 1 hour after dosing and continued to decrease until 12 hours after dosing before progressively and significantly increasing toward baseline values by 96 hours after dosing. At necropsy, myelosuppression was not observed in any bird and no evidence of carboplatin toxicity was found. These results provide veterinarians with useful data for formulating efficacious and safe protocols for platinum-containing compounds when treating neoplasia in parrots and other companion birds.
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Vol. 19 • No. 2