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Research Article

Aldicarb Poisoning by an Illicit Rodenticide Imported into the United States: Tres Pasitos

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Pages 447-452 | Published online: 31 Aug 2001
 

Abstract

Objective: Although intentional and unintentional rodenticide poisoning is common, most readily available agents are of relatively low acute toxicity. A four-year long epidemic of severe toxicity from rodenticide exposure continues among patients predominantly of Dominican descent living in New York City. This study characterizes the ongoing epidemic of acute cholinesterase inhibitor poisoning due to an illicit rodenticide and identifies its etiology. Methods: A prospectively collected case series of poisoned patients referred to the New York City Poison Control Center. The main outcome measures include the clinical characteristics upon presentation, antidotal and other therapeutic requirements, and patient outcome. Product analysis was performed with paper chromatography, gas chromatography/mass spectrometry, and high-performance liquid chromatography. A murine model assessing both clinical effect and cholinesterase activity was also performed. Results: Thirty-five patients were referred following exposure to Tres Pasitos. Patients developed signs of cholinergic hyperactivity and many required high doses of atropine (>10 mg) to control these symptoms. The source was identified as a rodenticidal compound sold illicitly in local groceries primarily within the Dominican community. Murine cholinesterase activity fell significantly following exposure to the rodenticide. High-performance liquid chromatography identified aldicarb, an extremely potent carbamate-type cholinesterase inhibitor, not licensed for rodenticidal use in this country. Conclusion: Illicit sale of undocumented compounds poses a substantial public health threat. Despite several public health interventions, the epidemic continues.

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