Delayed Patch-Test Reading After 5 Days: An Update From the Mayo Clinic Contact Dermatitis Group

Patch-test readings after day 5 have previously been used to identify delayed reactions to metals and topical antibiotics.The aims of this study were to identify allergens for which late readings (beyond day 5) would be most valuable and to compare our results with our previous study on delayed patch-test readings.This was a retrospective study of 298 patients who underwent metal and corticosteroid series patch testing from January 1, 2007,...