Contact sensitization in children with atopic dermatitis
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Keywords
Dermatitis, Atopic, Allergic contact, Nickel, Patch tests
Abstract
Background: Atopic dermatitis is a common illness in childhood. Children with atopic dermatitis are prone to develop cutaneous sensitization due to skin barrier dysfunction.
Aim: The aim of this study was to evaluate the frequency of cutaneous sensitizations in patients with atopic dermatitis and to identify the most frequent causative allergens.
Study design: The study group consisted of 112 children with atopic dermatitis, aged 1-18 years (median 88.5 months) and 39 healthy controls, aged 1-8 years (median 88.48 months).
Methods: The diagnosis of atopic dermatitis was established by modified Hanifin and Rajka criteria; severity of the disease was assessed by scoring of atopic dermatitis. Serum blood eosinophil count, total IgE and skin prick tests for common aeroallergens and food allergens were performed. Patch tests with cosmetic series and European standard patch test series (Stallegenes© Ltd, Paris, France) were applied.
Results: Of the children with atopic dermatitis, 17% (n = 19) were sensitized to either cosmetic or standard series or both of them; no children in the control group had a positive patch test (p = 0.001). Atopy and severity of atopic dermatitis was not a significant risk factor for cutaneous sensitization. The most common allergens were Nickel sulphate and Methychloroisothiazinolone (4.5% and 4.5%) in the European standard patch test and cocamidoproply betaine (12.5%) in the cosmetic series patch test.
Conclusion: Cutaneous sensitization can develop in children with atopic dermatitis, therefore allergic contact dermatitis should be kept in mind.
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