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Lyme disease — ABFM Board MCQ

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EasyInfectious diseaseLyme diseaseABFM Board

A 36-year-old man in Connecticut has an expanding annular erythematous rash with central clearing 10 days after hiking. He has fatigue and low-grade fever. Which of the following is the most likely diagnosis?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: A — Early localized Lyme disease

Erythema migrans after tick exposure in an endemic area is diagnostic of early localized Lyme disease.

Reference: CDC clinical guidance: https://www.cdc.gov/