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Related Experiment Videos

Endocarditis with Moraxella-like M-6 after cardiac catheterization.

R E Perez

    Journal of Clinical Microbiology
    |September 1, 1986
    PubMed
    Summary

    A rare Moraxella-like bacterium (CDC group M-6) caused bacteremia after heart catheterization. Prompt antibiotic treatment and valve replacement were successful, highlighting diagnostic challenges.

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    Area of Science:

    • Infectious Diseases
    • Cardiology
    • Microbiology

    Background:

    • Complicated cardiac catheterization procedures can lead to bloodstream infections.
    • Bacteremia caused by unusual or slow-growing organisms presents diagnostic challenges.

    Observation:

    • A patient experienced bacteremia with CDC group M-6, a Moraxella-like organism, post-cardiac catheterization.
    • The patient received treatment with tobramycin and ampicillin.
    • Surgical aortic valve replacement was performed, with no signs of infection noted post-operatively.

    Findings:

    • CDC group M-6 exhibits slow growth, potentially delaying diagnosis.
    • Antibiotic susceptibility testing for M-6 may yield misleading results.
    • Penicillin is not consistently effective against this specific Moraxella-like organism.

    Implications:

    • Early recognition of slow-growing pathogens like M-6 is crucial for effective treatment.
    • Standard antibiotic susceptibility testing may require modification for atypical bacteria.
    • This case underscores the importance of considering diverse etiologies in post-procedural infections.

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