A 7-year-old girl presents with a swollen earlobe for several days treated by her pediatrician with oral antihistamines and topical mupirocin. The eruption progresses to that shown in the image in addition to the development of fever, malaise, and neck pain. What would be the next best step in management for this patient?

A. Obtain a bacterial culture

B. Increase dosage and frequency of antihistamines and apply cool compresses

C. Order bloodwork for Lyme borreliosis

D. Treat with oral amoxicillin

E. Recommend acetaminophen for fever and apply menthol-containing topicals for pruritus

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