>> A recent study in humans demonstrated that B. burgdorferi DNA was identified in PTDLS patient by xenodiagnosis but unable to culture viable spirochete17. In about 85% of Lyme arthritis patients, B. burgdorferi DNA was detected in synovial fluid by polymerase chain reaction (PCR) testing
The previous sentence is also important:
>Many research studies has [sic] shown that B. burgdorferi establishes persistent infections after antibiotic treatment in various animal models.
The previous sentence is also important:
>Many research studies has [sic] shown that B. burgdorferi establishes persistent infections after antibiotic treatment in various animal models.