Σφακιανάκης Αλέξανδρος
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Κυριακή 14 Οκτωβρίου 2018

ORAL FOOD CHALLENGE FAILURES AMONG FOODS RESTRICTED DUE TO ATOPIC DERMATITIS

Publication date: Available online 14 October 2018

Source: Annals of Allergy, Asthma & Immunology

Author(s): AA Eapen, KM Kloepfer, FE Leickly, JE Slaven, G Vitalpur

Abstract
BACKGROUND

Recent studies have suggested that removing foods from the diet to manage atopic dermatitis (AD), based on positive allergy tests, may lead to immediate allergic reactions on reintroduction of that food.

OBJECTIVE

The purpose of this study was to examine the frequency of oral food challenge (OFC) failures among foods removed from the diet as suspected AD triggers, focusing on the five major food allergens in the US.

METHODS

OFCs to egg, milk, peanut, soy, and wheat, performed from 2008-14, at a children's hospital's allergy clinics, were reviewed. OFCs were offered based on history and laboratory values. Reasons for food avoidance were classified as food allergy (IgE-mediated reaction occurring within two hours); sensitization only (lack of introduction due to positive test results); and removal due to test results during AD evaluation.

RESULTS

There were 442 OFCs performed, with 89 failures (20.1%). Reasons for OFCs included a history of food allergy (320/442; 72.4%); food sensitization without any introduction (77/442; 17.4%); and AD (45/442; 10.2%). OFC failures among those who had food allergy (70/320; 21.9%); sensitization only (13/77; 16.9%); and suspected AD trigger (6/45; 13.3%) did not significantly differ (p=0.63). Wheat was more likely to be avoided than the other four foods for AD concerns (p<0.0001).

CONCLUSION

The frequency of OFC failure among those who removed foods suspected as AD triggers was 13.3%, indicating a loss of tolerance. Restriction of foods to manage AD must be done with caution and close monitoring.



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