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To the Editor.—
Recently, we have come across an interesting case, in which erythema multiforme developed in a woman 25 years of age merely a few hours after coming in contact with an insecticide, methyl parathion (Dalf) (2% fanthion), sprayed for killing bedbugs. She had multiple erythematous papulosquamous iris pattern lesions all over her body, with the greatest amount occurring over the extensor aspects of her legs, hands, chest, back, and abdomen that persisted for 20 days. She was not taking any other drugs, had not had a recent vaccination, and had no allergic reactions to food. She did not have a history of similar lesions. All the investigations were within normal limits, except for mild albuminuria and an increase in the eosinophil value. Skin biopsy specimen taken were consistent with the diagnosis of erythema multiforme. She responded well to antiallergic tablets and vitamin C.Re-exposure to a provocative dose