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Related Experiment Videos

Cognitive function in post-treatment Lyme disease: do additional antibiotics help?

R F Kaplan1, R P Trevino, G M Johnson

  • 1University of Connecticut School of Medicine, Farmington, USA. kaplan@psychiatry.uchc.edu

Neurology
|June 25, 2003
PubMed
Summary
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Additional antibiotics did not improve cognitive function in patients with post-treatment chronic Lyme disease (PTCLD). Studies found no significant differences between antibiotic and placebo groups, indicating no objective cognitive impairment in these patients.

Area of Science:

  • Infectious Diseases
  • Neurology
  • Clinical Research

Background:

  • The efficacy of additional antibiotic treatment for cognitive improvement in post-treatment chronic Lyme disease (PTCLD) remains controversial.
  • PTCLD patients often report persistent symptoms despite prior antibiotic therapy.

Purpose of the Study:

  • To investigate whether antibiotic therapy enhances cognitive function in patients diagnosed with PTCLD.
  • Two randomized, double-blind, placebo-controlled studies were conducted to assess this question.

Main Methods:

  • 129 patients with a history of Lyme disease were enrolled across three US sites.
  • Participants were randomized to receive either intravenous ceftriaxone followed by oral doxycycline or matching placebos.
  • Cognitive function, mood, and symptom severity were assessed using objective tests and standardized scales at 90 and 180 days.

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Main Results:

  • While patients showed improvements in symptoms, mood, and objective test scores from baseline to 90 days, there were no significant differences between the antibiotic and placebo groups.
  • Both seropositive and seronegative patients reported high symptom frequencies but had normal baseline neuropsychological scores.
  • No significant differences in outcomes were observed between patients receiving antibiotics and those receiving placebo.

Conclusions:

  • Patients with PTCLD and persistent symptoms, but no evidence of active Borrelia infection, do not exhibit objective cognitive impairment.
  • Extended antibiotic therapy demonstrated no additional benefit over placebo in improving cognitive function or overall well-being in this patient population.