<prompt> A 9 year-old girl presents with an annular plaque on the arm with peripheral scale. Topical nystatin ointment is prescribed and 2 weeks later the rash is unchanged. What is the next best step?Sta appropriate antifungal with efficacy against dermatophytes.Sta an oral antibioticTopical coicosteroidLonger course of nystatin  <response>: Characteristic lesions on arm with annular plaque and peripheral scaling is seen in dermatophyte infection Treatment involves the use of oral terbinafine, fluconazole, itraconazole, griseofulvin or one of several well-tried topical preparations. 