[Chronic lichenoid dermatitis in sensitization to alpha-amylase in a baker]

We report on the sensitization of a baker against alpha-amylase contained in a dough additive. Positive test reactions to alpha-amylase were observed after 20 min., 6 h, and 72 h, even following heat inactivation. Specific IgE, IgG, and IgM antibodies could be proved in the serum. We assume mixed reactions of type I, III and IV.