The investigators will focus on elderly patients with early Lyme borreliosis with the aim of assessing clinical course, serological response and treatment outcome of the disease as compared to younger adults. Furthermore, the investigators will compare the prevalence of nonspecific symptoms among patients and among age-matched controls without a history of Lyme borreliosis.
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Occurrence of objective clinical manifestations of Lyme borreliosis and post-Lyme symptoms at 14 days postenrollment in patients treated for erythema migrans
Timeframe: Study point: at 14 days post-enrollment.
Occurrence of objective clinical manifestations of Lyme borreliosis and post-Lyme symptoms at 2 months postenrollment in patients treated for erythema migrans with doxycycline for 7 or 14 days
Timeframe: Study point: at 2 months post-enrollment.
Occurrence of objective clinical manifestations of Lyme borreliosis and post-Lyme symptoms at 6 months postenrollment in patients treated for erythema migrans
Timeframe: Study point: at 6 months post-enrollment.
Occurrence of objective clinical manifestations of Lyme borreliosis and post-Lyme symptoms at 12 months postenrollment in patients treated for erythema migrans
Timeframe: Study point: at 12 months post-enrollment.