Abstract
Allergen component-resolved diagnostic testing (CRD) is a new methodology in clinical food allergy diagnosis, improving the ability to identify specific clinical phenotypes. Instead of relying on the crude allergen extracts used in standard allergy diagnostics, CRD utilizes purified or recombinant allergens for identification of specific molecules causing sensitization or allergy. This method is able to determine risk of the severity of allergic reactions in specific cases, like soy, peanut, and hazelnut allergy. The severity of allergic reaction can be predicted in peanut allergy with Ara h 2, and clinically relevant disease in pollen-allergic patients can be identified. However, age and geographic differences affect CRD results and it should always be utilized in the context of a clinical history. In the future, clinical phenotypes may be differentiated with larger prospective studies utilizing food challenges.
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