Allergy to citrus juice

Background Mathieu was diagnosed with egg allergy when he was 7 months old with complete tolerance at age 3. He subsequently developed an asthma (mite and dog sensitization) that was controlled with inhaled corticosteroids. At age 4, he developed a severe anaphylactic reaction shortly after drinking a fresh fruit juice of carrot and lemon. He drank a homemade juice and after fifteen minutes he had nausea with intense abdominal pain, an asthma exacerbation with wheezing, followed by repeated vomiting and, one hour later, a generalized urticaria. The symptoms were severe and the boy was admitted to the emergency department: he was administered corticosteroids and systemic antihistamine but not epinephrine, and was continuously monitored for 24 hours. He fully recovered and was discharged.