This article has no abstract; the first 100 words appear below.

The condition of most patients with Lyme disease improves after initial antibiotic therapy; however, 10 to 20% of treated patients may have lingering symptoms of fatigue, musculoskeletal pains, disrupted sleep, and lack of customary mental functions. The plausible idea that additional antimicrobial therapy for potentially persistent bacterial infection would foster improvement has been a touchstone of hope in the 40 years since discovery of the disease in the mid-1970s. Patients with long-standing symptoms and well-documented, previously treated Lyme disease have been the focus of a number of randomized, placebo-controlled studies in North America that assessed whether additional antibiotic therapy offers . . .