Derm Dx: An erythematous annular plaque with central clearing

A 21-year-old patient presents with a five-day history of a nonpruritic, erythematous rash with concomitant low-grade fever, headache and arthralgias. She has been working as a camp counselor in New York during her college summer break. She does not recall a tick or other insect bite and none of the other camp counselors or campers have developed a similar rash.

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