IGHE and food allergy: Results: 85% (n=31) of birch pollen allergic patients (n=37) were positive for Bet v 1. Art v 1 was more prevalent (i.e., 79%) in pollen-food allergic patients than in pollen allergic patients without food allergy (i.e., 33%). IgE reactivities to Bet v 1 and Pru p 1 and between Art v 3 and Pru p 3 were significantly correlated.