Sensitization Profiles to Hazelnut Allergens across the United States of America

Hazelnut is a widely consumed tree nut and among the top five most serious instigators of food allergic reactions.1-4 Hazelnut allergy can manifest symptoms that range from mild oral itching to fatal anaphylaxis.4-7 Population-based surveys have found that the incidence of hazelnut allergy varies greatly from location to location, depending on exposure to cross-reacting pollen allergens.8-10 The prevalence of hazelnut allergy is estimated to be 0.2 % in children and up to 4.5 % in adults in regions with heavy exposure to pollen of birch or related tree species.

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