Allergic contact dermatitis toPrimula obconicahas long been established. It is considered a significant allergen in Europe and has been included in standard screening there. The allergen is much less common in the United States. The frequency of allergy toP obconicain the United States is difficult to assess because no series of routine testing to this allergen has been reported. The purpose of this study was to evaluate the frequency of primin allergy in routine testing in a referral patch test center. A series of 567 consecutive patch tests was performed that included primin as part of the standard screening. Only one patient had a positive reaction. Although it is frequently missed and often difficult to diagnose, the frequency of primin allergy in this series was too low to indicate including this allergen as part of routine testing.
From the Department of Dermatology, University of Pennsylvania, Philadelphia, PA.
Address reprint requests to Christen M. Mowad, MD, University of Pennsylvania, Department of Dermatology, 34th and Spruce Streets, Philadelphia, PA 19104.
©1998American Contact Dermatitis Society