Multiple primary food allergy in pediatric patients seen in a tertiary referral center

Methods MPFA was defined as primary allergy simultaneously occurring to at least 3 unrelated foods. Allergy to a specific food was considered proven based on at least one of the following: a clear cut clinical history; elimination and reintroduction; a specific IgE level or skin prick test size ≥ the 95% positive predictive value (defined for cow’s milk, egg, peanut, wheat, potato); a positive provocation test. Primary allergy to the given food was documented by the involvement of class 1 allergens and/or the timing of food allergy development. Files of all patients visiting our tertiary Pediatric Allergy Center between September 2008 and August 2009 were studied retrospectively.