Erythema migrans. The tick bite occurred 14 days before the picture was taken. The patch (7 x 7 cm) has no pale central area any more, and it bears some resemblance to nummular eczema. Borreliosis (B. garinii) was verified (for research purposes) by culture from a biopsy taken from the lesion.
Picture: Åland Borrelia Group
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