BACKGROUND The prevalence of contact allergy to fragrance mix (FM) I varies from study to study, depending on factors such as test population, patch test material, and technique. OBJECTIVES To compare the outcome of routine patch testing with FM I TRUE Test and FM I Trolab. MATERIALS AND METHODS A total of 5006 consecutive eczema patients were patch tested with both patch test materials acc...

BACKGROUND Delayed-onset urticarial or maculopapular rashes are frequently observed in children treated with β-lactams. Many are labeled "allergic" without reliable testing. OBJECTIVE Determine the etiology of these rashes by exploring both infectious and allergic causes. METHODS Children presenting to the emergency department with delayed-onset urticarial or maculopapular rashes were enrol...

In this issue of the BJD, Ye et al.1 present data on T-cell-specific responses in patients with antituberculosis drug (ATD)-induced maculopapular exanthema (MPE) and drug reaction with eosinophilia and systemic symptoms (DRESS). Understanding these responses helps further our knowledge of the immunopathogenesis of antituberculous hypersensitivity, and ideally it would be translated into diagnos...

BACKGROUND AND AIMS The aim of this present study was to evaluate the role of patch testing for the etiological diagnosis of chronic urticaria (CU) by using the Indian standard battery of patch test allergens approved by Contact and Occupational Dermatitis Forum of India (CODFI). METHODS A total of 57 cases with chronic urticaria were tested with the Indian standard battery of allergens. All ...

BACKGROUND The fixed drug eruption is a common adverse drug reaction. Clear identification of the culprit drug is not always possible in the clinical setting, and oral rechallenge may induce new lesions or severe reactions. OBJECTIVES The main purpose of this study was to evaluate the diagnostic value of patch testing in establishing an aetiological diagnosis in fixed drug eruptions. METHOD...

BACKGROUND Diethylthiourea is widely used in the rubber industry, particularly in neoprene rubber, and may cause allergic contact dermatitis. However, as thiourea allergens are not part of the European baseline series, the diagnosis of allergic contact dermatitis caused by thiourea compounds depends on clinical suspicion and aimed testing. OBJECTIVES The aims of this study were to evaluate th...

The elicitation of a positive patch test reaction in a given individual depends upon the dose of the sensitizer applied, the patch test technique and the occlusion time. The dose is determined by the concentration and volume/amount of test preparation applied. If the same amount/volume of a test preparation is applied all the time with the same test technique (same area of skin) and occlusion t...

BACKGROUND Contact dermatitis of the scalp is common and might be caused by many chemicals including metals, ingredients of shampoos and conditioners, dyes, or other hair treatments. Eliciting a careful history and patch tests are necessary to identify the responsible allergen and prevent relapses. OBJECTIVES To identify allergens that may cause contact dermatitis of the scalp by reviewing pa...