A 45-year-old woman reported recurrent episodes of urticaria, which had first appeared about one year earlier, when she started a diet which included eating frozen vegetable soup almost daily. Patch tests with the standard European series, food preservatives and colourings were performed and the results were only positive (+++, following the International Contact Dermatitis Research Group criteria) for p-aminoazobenzene. After avoiding eating frozen vegetable soup from a coloured plastic wrapper, which was probably coloured with para-amino compounds that cross-reacted with p-aminoazobenzene, the patient’s urticaria rapidly disappeared.

Allergic response due to a para-amino compound

RICCIARDI, Luisa;SPECIALE, ANTONIO;SAIJA, Antonina;GANGEMI, Sebastiano
2009-01-01

Abstract

A 45-year-old woman reported recurrent episodes of urticaria, which had first appeared about one year earlier, when she started a diet which included eating frozen vegetable soup almost daily. Patch tests with the standard European series, food preservatives and colourings were performed and the results were only positive (+++, following the International Contact Dermatitis Research Group criteria) for p-aminoazobenzene. After avoiding eating frozen vegetable soup from a coloured plastic wrapper, which was probably coloured with para-amino compounds that cross-reacted with p-aminoazobenzene, the patient’s urticaria rapidly disappeared.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/1876407
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