Paediatricsniche
A 7-year-old girl returns from a camping trip in far north Queensland with five days of fever, headache and severe myalgia. There is a 1 cm black-crusted ulcer with a red rim on her calf, with tender inguinal nodes. A fine red maculopapular rash has appeared on her trunk and limbs. She is alert and well perfused, with no meningism and no respiratory distress. Which one of the following oral antibiotics is most appropriate?