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9049. Allergen. Extract. Hazelnut (hazelnut, f17), IgE antibodies
Description
Hazelnut allergy is a type of food allergy to nuts, in which the allergen is hazelnuts. However, a reaction to hazelnuts (domesticated hazelnuts or filberts) is considered the most common food allergy. Hazelnut allergy is most often seen in patients with tree pollen allergies. Symptoms of hazelnut allergy can generally be similar to oral allergy syndrome: itching and burning in the mouth, tingling of the tongue, swelling of the tongue, a rash around the mouth, and peeling of the vermilion border of the lips. This test is used to diagnose hazelnut allergy and, in conjunction with sensitivity testing to other pollen antigens, to determine a person's allergy status.
When and who needs the test?
- Testing is indicated for patients with suspected hazelnut allergy, particularly when symptoms arise following its consumption — including itching and burning in the oral cavity, swelling of the lips and tongue, urticaria, gastrointestinal manifestations, or respiratory symptoms.
- Recommended for individuals with pollinosis (especially those sensitized to birch pollen), in whom cross-reactive responses to hazelnut and the development of oral allergy syndrome are possible.
- Indicated for patients with a history of systemic allergic reactions to nuts, to assess the risk of severe reactions including anaphylaxis.
- Appropriate for children and adults with atopic conditions (atopic dermatitis, bronchial asthma, allergic rhinitis), as well as in cases where differentiation between primary food allergy and cross-reactive pollen-food reactivity is required.
Biological material
- Venous blood
Preparing for a blood test
In order to exclude factors that may affect the test results, we recommend to follow the preparation rules:
- an important condition for laboratory tests is to take blood on an empty stomach.
- 6-12 hours before the test, you should avoid eating, drinking alcohol, smoking, and limit physical activity. Drinking...
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