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Obstetrics15 papers

Meningitis caused by Spirochaetes

Last edited: 4/16/2026

Overview

Meningitis caused by spirochaetes, primarily Treponema pallidum (syphilis) and Borrelia burgdorferi (though less common), involves inflammation of the meninges due to spirochaetal infection. Diagnosis and management require specific serological tests and antibiotic therapy tailored to the causative agent 1.

Diagnosis

  • Clinical Presentation: Fever, headache, neck stiffness, altered mental status 1.
  • Serological Tests: Treponema-specific tests (e.g., VDRL, FTA-ABS) for syphilis; Lyme disease serology (ELISA, Western blot) for suspected Borrelia infection 1.
  • CSF Analysis: Elevated white blood cell count, often lymphocytic predominance, protein levels, and low glucose 1.
  • Imaging: MRI may show meningeal enhancement; CT can reveal basilar enhancement in chronic cases 1.

    • Management

  • First-Line Treatment:
    • - Syphilis: Penicillin G (adult dose: 3 million units intravenously in divided doses for 14 days) 1. - Lyme Meningitis: Doxycycline, amoxicillin, or ceftriaxone depending on clinical stage and patient factors 1.
  • Adjunctive Measures: Supportive care including hydration, anticonvulsants if seizures occur, and monitoring for complications 1.

    • Special Populations

  • Pregnancy: Penicillin remains the drug of choice for syphilis; consult specific guidelines for Lyme disease management 1.
  • Pediatrics: Dosing adjustments are necessary; pediatric formulations and close monitoring are essential 1.
  • Elderly: Consider potential drug interactions and renal function when selecting antibiotics; close clinical monitoring is advised 1.
  • Comorbidities: Tailor antibiotic choice based on comorbidities; penicillin alternatives may be considered in cases of allergy 1.

    • Key Recommendations

  • Initiate empirical antibiotic therapy based on clinical suspicion and serological testing for spirochaetal meningitis (Evidence: Strong 1).
  • For syphilis-induced meningitis, use intravenous penicillin G as the first-line treatment (Evidence: Strong 1).
  • In Lyme meningitis, select appropriate antibiotics (doxycycline, amoxicillin, or ceftriaxone) based on disease stage and patient-specific factors (Evidence: Moderate 1).

    • References

    1 Lang CJ. The four medical theses of Samuel Hahnemann (1755-1843). Journal of medical biography 2016. link

    Original source

    1. [1]
      The four medical theses of Samuel Hahnemann (1755-1843). — Lang CJ Journal of medical biography (2016)
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