Journal article

The additive value of patch testing with patients' own products at an occupational dermatology clinic

Dan Slodownik, Jason Williams, Kathryn Frowen, Amanda Palmer, Melanie Matheson, Rosemary Nixon



BACKGROUND AND OBJECTIVES: Patch testing with commercially available kits detects only 70-80% of relevant allergens in patients with contact dermatitis. This is not ideal, especially when occupational issues are being evaluated. This study analyses our data regarding reactions to patients' own products. METHODS: In a 5-year period, 1532 patients were assessed in our occupational dermatology clinic. RESULTS: We found that 101 patients (6.6%) reacted to their own samples. In 20 (1.3%) cases, reacting to their own samples was the only clue for detecting the responsible allergen. In 59 (3.9%) cases, testing with their own samples reinforced their reactions to commercial allergens. CONCLUSIONS: W..

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