[Human seminal plasma allergy type I].

Human seminal plasma allergy (HSPA) is a rare allergic reaction to specific protein fractions of seminal plasma, whereof PSA seems to be a relevant allergen. Predominantly Type I-immunoreactions can occur. The main symptoms are localized and generalized urticaria and sometimes anaphylactic symptoms. The diagnosis is based on history, skin tests and on the determination of specific IgE-levels for (un)fractionated seminal plasma. Here we report a patient with recurrent episodes of generalized urticaria after unprotected sexual intercourse and positive prick-test-reaction on seminal plasma.