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A case presents with fever, rash, and dizziness in an outdoor hiker, suggesting a possible diagnosis.
A patient in the upper Midwest had fever, rash, dizziness, multiple erythematous annular rashes on the back and lower extremities, and third-degree AV block. The patient reported frequently hiking outdoors but no recent travel, new medications, sick contacts, or ticks on the skin. What is the diagnosis and what would you do next?
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Lajaunie et al. (2026) studied this question.
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