Airborne occupational allergic contact dermatitis from champignon mushroom

image: Allergic contact dermatitis from mushrooms has only seldom been reported. image: We report on a mushroom picker who developed skin symptoms from occupational exposure to the mushroom champignon. image: Conventional patch testing and prick testings were performed. image: Erythema and vesicular edemic dermatitis appeared around the eyes, on the cheeks, around the nose, and around the lips of a 31-year-old woman who had been involved in the commercial production of champignons for 5 years. Prick testing to champignon was negative, but patch testing with raw champignon provoked a 2+ allergic reaction and was negative in the controls. image: Our patient had been occupationally sensitized from exposure to champignon. The allergen is not known but may be a low-molecular-weight chemical or a protein present in the champignon.