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Related Experiment Videos

Human infection caused by penicillin-insensitive pneumococci.

L Devitt, I Riley, D Hansman

    The Medical Journal of Australia
    |April 16, 1977
    PubMed
    Summary

    Penicillin-resistant pneumococci caused severe infections, including two fatal cases of pneumonia and meningitis. These resistant strains also showed reduced susceptibility to other common antibiotics.

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    Area of Science:

    • Medical Microbiology
    • Infectious Diseases

    Background:

    • Pneumococcal infections remain a significant global health concern.
    • The emergence of antibiotic resistance in Streptococcus pneumoniae poses a therapeutic challenge.

    Observation:

    • Three cases of severe pneumococcal infections are presented.
    • Patients included a young adult with fatal pneumonia, an infant with fatal meningitis, and a child with bronchiectasis and bacteremia.
    • The causative pneumococci (serotypes 6, 16, 19) exhibited relative resistance to penicillin G.

    Findings:

    • Minimal inhibitory concentrations (MICs) of penicillin G ranged from 0.1 to 1.0 microgram/ml (resistance ratios of 5-50).
    • Isolates demonstrated cross-resistance to penicillin V, methicillin, cloxacillin, and cephalosporins.
    • This indicates a broader resistance pattern beyond penicillin.

    Implications:

    • Highlights the clinical threat of penicillin-resistant pneumococci.
    • Underscores the need for ongoing surveillance of antibiotic resistance patterns.
    • Suggests potential limitations of current antibiotic treatment regimens for severe pneumococcal disease.

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