Gonçalo, SGonçalo, Margarida2012-10-242012-10-241991Contact Dermatitis. 1991;24(1):40-4.http://hdl.handle.net/10400.4/14599 cases of contact sensitivity to Dittrichia viscosa, mainly with an airborne pattern, are described. All patients reacted to the fresh leaf of the plant and to its ethereal extracts at 1 and 0.5% pet., and some of them also to that at 0.1% pet. Positive reactions to Frullania dilatata, Laurus nobilis, some other members of the Compositae, and helenin were observed, suggesting the diagnosis of a sesquiterpene-lactone-induced allergic contact dermatitis.engDermatite de ContactoPlantasjournal article