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wheal-and-erythema reaction


Definition: the characteristic immediate reaction observed in an allergy skin test; within 10–15 minutes after injection of antigen (allergen), an irregular, blanched, elevated wheal appears, surrounded by an area of erythema (flare).

Synonym(s): wheal-and-flare reaction

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.