Prolonged toxicity of organophosphate poisoning.

A case of poisoning with a new organophosphate (fenthion) is reported in which the initial cholinergic crisis was delayed 5 days and recurred 24 days after ingestion. Psychosis was a persistent and sometimes singular manifestation. Because of the high lipid solubility of this pesticide, toxin analysis of repeated fat biopsies was an essential component of the management of this patient.