wheal-and-flare reaction

The characteristic immediate reaction to an injected allergen in a skin test, in which an irregular blanched wheal appears, surrounded by an area of redness. Also called wheal-and-erythema reaction.

Etymology: AS, walu + flare + ME, fleare, to blaze up; L, re, again, agere, to act

a skin eruption that may follow injury or injection of an antigen. It is characterized by swelling and redness caused by a release of histamine. The reaction usually occurs in three stages, beginning with the appearance of an erythematous area at the site of injury, followed by development of a flare surrounding the site; finally a wheal forms at the site as fluid leaks under the skin from surrounding capillaries.

wheal-and-flare reaction (wēlˑ -and-flerˈ rē·akˑ·sh

n),

n a three-stage reaction that develops on the surface of the skin because of injury or exposure of the body to an antigen via injection. The condition is characterized by redness and swelling that results from release of histamine.

Wheal-and-flare reaction.

wheal-and-flare reaction

Triple response of Lewis Immunology A series of 3 sequential responses that occur in skin subjected to minor trauma, caused by tissue release of histamine; WFR tests immediate hypersensitivity–'reaginic' or allergic reaction to an antigen, and can be transferred to a nonallergic person. See P-K test.

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Casoni's test chain reaction delayed reaction immune reaction lengthening reaction reaction reaction of degeneration reaction time stress reaction	Sensitized patients will develop a wheal-and-flare reaction within 15 minutes. Specific IgE testing: objective laboratory evidence supports allergy ... by Choo-Kang, Lee R. / Medical Laboratory Observer The authors found that while both cetirizine and fexofenadine significantly suppressed the wheal-and-flare reaction over the 24-hour test period, cetirizine demonstrated greater [H. Pediatric allergic rhinitis: factors affecting treatment choice by Gelfand, Erwin W. / Ear, Nose and Throat Journal	Wet Sandpaper Appearance wet tail wet tap wet to dry dressing wet-and-dry-bulb thermometer wet-belly disease wet-drying wet-sheet pack wet-sheet treatment wether wetness wettability wetting wetting agent wetting solution Wetware WFF ‘N Proof Tests Whacker whale Whale Tail Whalebone in a Corset Sign Wharton's duct Wharton's jelly wheal wheal erythema response wheal-and-flare reaction wheal-flare wheat wheat weevil disease wheaten wheatgrass Wheatstone amblyoscope wheel wheel, Burlew wheelbarrowing wheelchair Wheelhouse Operation wheelie wheeze wheezing whelk whelping whewellite whey whey protein whiff test whinny WHIP whip muscle whip stitch whiplash	WHCSS WHCT WHCU WHCZ WHD WHDA WHDAB WHDC WHDF WHDGA Whdi WHDP WHDR WHDS WHDT WHE Whe'wahchee WHEA wheal wheal wheal wheal wheal and erythema reaction wheal and erythema reaction wheal and erythema reaction wheal and erythema reaction wheal and erythema reaction wheal and flare reaction wheal and flare reaction wheal erythema response wheal-and-flare reaction wheal-flare wheal-flare reaction wheal-flare reaction wheal-flare reaction wheal-flare reaction wheal-flare reaction whealed whealed whealed whealed whealing whealing whealing whealing Wheals Wheals Wheals Wheals Whealthy Whealthy Whealthy Whealthy Whealworm WHEAP wheat wheat wheat wheat wheat wheat

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Casoni's test
chain reaction
delayed reaction
immune reaction
lengthening reaction
reaction
reaction of degeneration
reaction time
stress reaction

Sensitized patients will develop a wheal-and-flare reaction within 15 minutes.

Specific IgE testing: objective laboratory evidence supports allergy ... by Choo-Kang, Lee R. / Medical Laboratory Observer

The authors found that while both cetirizine and fexofenadine significantly suppressed the wheal-and-flare reaction over the 24-hour test period, cetirizine demonstrated greater [H.

Pediatric allergic rhinitis: factors affecting treatment choice by Gelfand, Erwin W. / Ear, Nose and Throat Journal