Hazel (Corylus avellana) is a widely distributed nut allergen in Europe and Western Asia. Hazelnut can cause allergic reactions in two ways: as a primary food allergy mediated by IgE, or as oral allergy syndrome (OAS) associated with birch pollen allergy. Hazelnut allergy often manifests as oral symptoms, but in children, it can cause severe systemic reactions, including anaphylaxis.
Hazelnut allergy is one of the most common nut food allergies in Europe. It can present as oral allergy syndrome (OAS) or as severe systemic reactions, including anaphylaxis. Identified hazelnut allergen components (Cor a1, Cor a8, Cor a9, Cor a14, and others) help differentiate primary allergy from cross-reactivity with birch pollen. The test allows detection of specific IgE levels, which is important for accurate diagnosis, assessing the risk of reaction severity, and selecting effective therapy.
FEIA (Fluorescence Enzyme Immunoassay) using ImmunoCAP (Solid-phase Immunofluorescence) – quantitative determination of specific IgE to hazelnut.
Please note that the research method and reference values may vary depending on the equipment and test systems used.