Concomitant positive patch test results with standard screening tray in North America 1985–1989

Abstract

Responses to patch test substances may occur contemporaneously. Such simultaneous reactions may reflect concomitant sensitization to 2 dissimilar allergens to which concurrent exposure has taken place (e.g., ethylenediamine dihydrochloride and neomycin). It may occur when the individual has been exposed to only 1 of the substances and exhibits a response to other substances of similar chemical structure (i.e., cross-sensitization such as between para-phenylenediamine and benzocaine). Such simultaneous responses may also be chance occurrences, reflecting multiple sensitization or the result of altered response due to the "angry back syndrome". This investigation established that such concurrence of response is not uncommon and adds further documentation to the literature of these associations in patch test responses.

Contact allergens in Kashmiri population: Results from a 6-year patch testing experience in 550 patients

“…Males showed a significantly less incidence of positive reactions to the patch test allergens than females, a phenomenon that has been reported in many Western studies till date. [1,5] In our cases, hand eczema was the commonest clinical diagnosis and this is more in conformity with studies from outside India than the Indian studies on this subject. [5,6] In Indian studies, either footwear dermatitis or airborne contact dermatitis predominate in patients in patch test clinics.…”

“…[1,5] In our cases, hand eczema was the commonest clinical diagnosis and this is more in conformity with studies from outside India than the Indian studies on this subject. [5,6] In Indian studies, either footwear dermatitis or airborne contact dermatitis predominate in patients in patch test clinics. [3,4] Among topical antimicrobials, neomycin and gentamicin were the commonest allergens [ Table 1], clearly demonstrating the hazards of the rampant use of these antimicrobials in topical medications.…”

“…[4] A study from Italy on oropharyngeal pemphigus showed 35% achieving drug free remission. [5] Study from Korea showed complete or partial remission in 77% at 5 years and 94% at 10 years after initial diagnosis.…”

p-Phenylenediamine in Black Henna Tattoos

“…To date, the prevalence of positive patch test re-action to PPD ranges from 2.0% to 4.8% in the general population. [9][10][11][12][13] A study by Patel et al 10 in London shows a linear increasing trend of the percentage of patients with allergic reactions to a PPD patch test from 2% in 1990 to 7.1% in 2005. Although not solely due to the increasing use of henna tattoos worldwide, this may contribute significantly to the increase in positive reactions to PPD in the general population, especially in children.…”

Proposal for a revised international standard series of patch tests

“…2. The North American standard series (5,6) according to the North American Contact Dermatitis Group (20 allergens). 3.…”