Hazelnut (f17)1566
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.
FEIA (Fluorescence Enzyme Immunoassay) using ImmunoCAP (Solid-phase Immunofluorescence) – quantitative determination of specific IgE to hazelnut.
- Diagnosis of allergic reactions to hazelnut.
- Assessment of sensitization level and risk of allergy development.
- Monitoring the effectiveness of ongoing therapy.
- Evaluation of sensitization level after allergen avoidance.
- Assessment of immune system status.
- Blood should be drawn in the morning on an empty stomach or 4 hours after eating.
- Drinking plain still water is allowed.
- Do not smoke for 30 minutes before the test.
- For children under 1 year – no food 30-40 minutes before the test; for children 1-5 years – 2-3 hours fasting.
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.