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Updated: Aug 27, 2025

Basophil Activation Test for Allergy Diagnosis

Basophil Activation Test for Allergy Diagnosis

Published on: May 31, 2021

Food allergy testing in atopic dermatitis.

Hassiel A Ramírez-Marín¹, Anne Marie Singh², Peck Y Ong³

¹Department of Dermatology, Weill Cornell Medical College, New York, New York.

JAAD International

|September 23, 2022

Summary

Food allergy can worsen atopic dermatitis (AD). Allergy testing and careful food elimination may help, but unguided avoidance is discouraged due to risks.

Keywords:

AD, atopic dermatitis APT, atopy patch testing FA, food allergy IgE, immunoglobulin E SPT, skin prick test Th2, helper T cell type 2 adult allergic atopic dermatitis child eczema food hypersensitivity humans immunoglobulin E inflammation patch test prick test rhinitis sIgE, food-specific immunoglobulin E

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Area of Science:

Immunology
Dermatology
Allergy

Background:

Atopic dermatitis (AD) is frequently associated with food allergies.
Food hypersensitivity can exacerbate dermatitis symptoms in AD patients.

Purpose of the Study:

To review the complex relationship between atopic dermatitis and food allergen hypersensitivity.
To evaluate the risks and benefits of food allergen testing and avoidance strategies in AD management.

Main Methods:

Literature review focusing on studies investigating food allergy in atopic dermatitis.
Analysis of diagnostic methods including skin prick tests, specific IgE, and atopy patch tests.
Evaluation of clinical outcomes related to food allergen elimination and empiric avoidance.

Main Results:

Immediate hypersensitivity in AD can be identified by skin prick tests and specific IgE to aeroallergens.
Atopy patch tests may detect non-IgE mediated reactions but lack standardization.
Younger children with severe AD unresponsive to treatment may have food-triggered conditions, with egg, milk, and peanut being common culprits.

Conclusions:

Eliminating identified food allergens can improve AD, but requires accurate allergy testing and clinical relevance confirmation.
Serum IgE panels for food allergens are difficult to interpret in primary care and empiric food avoidance is not recommended due to nutritional and other risks.