Mycoplasma pneumoniae (MP) can present in with mucocutaneous eruptions called Mycoplasma pneumoniae-induced rash and mucositis (MIRM). The lesions’ etiology can be difficult to determine, as treatments differ vastly. We present a case of a six-year-old female with skin dermatitis that was suspected and treated to be herpes simplex virus (HSV). The similar morphologies and presentations of the rash often occur resulting in delayed treatment and progression of MIRM. This case report seeks to add to the literature MIRM as part of the HSV differential. Accurate differentiation is critical, as MIRM requires antibiotics like macrolides, while HSV necessitates antivirals, impacting treatment outcomes and patient recovery.
Bergman et al. (Wed,) studied this question.