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Meningococcal meningitis: an atypical case.

J Mendelson, J Portnoy, I Libman

    Canadian Medical Association Journal
    |September 21, 1974
    PubMed
    Summary
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    Diagnosing meningitis may require multiple lumbar punctures. Even without prior antibiotics, cerebrospinal fluid cultures can be negative initially, highlighting the need for repeat testing in suspected cases.

    Area of Science:

    • Neurology
    • Infectious Diseases
    • Microbiology

    Background:

    • Meningococcal meningitis is a serious infection.
    • Early diagnosis is crucial for effective treatment.
    • Initial diagnostic tests may not always be conclusive.

    Purpose of the Study:

    • To describe a case of meningococcal meningitis.
    • To emphasize the diagnostic utility of repeated lumbar punctures.
    • To highlight challenges in early meningitis diagnosis.

    Main Methods:

    • Case report of a patient with suspected meningitis.
    • Serial lumbar punctures performed over seven days.
    • Cerebrospinal fluid analysis including bacterial culture.

    Main Results:

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    • The first two lumbar punctures yielded negative cultures.
    • The third lumbar puncture, performed after seven days, showed a positive culture for Neisseria meningitidis.
    • The patient had not received antibiotics prior to admission.

    Conclusions:

    • Repeated lumbar punctures are essential for diagnosing meningitis when initial tests are negative.
    • Cerebrospinal fluid culture sensitivity can be variable, even without prior antibiotic treatment.
    • This case underscores the importance of clinical suspicion and persistent diagnostic efforts in undiagnosed meningitis.