[Trichome].

A 4 year-old boy presented an acute pruriginous dermatitis of the hands, forearms and abdomen. A skin surface biopsy revealed numerous trichomes, small prickles present on plants. These trichomes were those of prickly pears and stuck deeply in the skin, inducing an inflammatory reaction known as Sabra dermatitis. A number of plant dermatitides are due to the presence of trichomes such as those due to linden, primula, wild rose or nettle.