What treatment should be administered for this patient’s rash? | Figure 1

A 28-year-old woman presents with a one-week history of a slightly raised erythematous lesion on her chest. She has been experiencing fatigue and joint pain since taking a walk through the woods in eastern Massachusetts earlier this month. She is 33-weeks pregnant and is otherwise well. An enzyme-linked immunosorbent assay (ELISA) test comes back negative for Lyme antibodies.

A. Doxycycline
B. Amoxicillin

C. Cephalexin
D. Loratadine

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