Acinetobacter and similar organisms in ear infections

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Murine Oropharyngeal Aspiration Model of Ventilator-associated and Hospital-acquired Bacterial Pneumonia
04:32

Murine Oropharyngeal Aspiration Model of Ventilator-associated and Hospital-acquired Bacterial Pneumonia

Published on: June 28, 2018

J V Dadswell

    Journal of Medical Microbiology
    |August 1, 1976
    PubMed

    Insights

    Acinetobacter-like organisms were isolated from patient ears with otitis media and otitis externa. While most strains were not pathogenic, some Acinetobacter species likely contributed to ear infections.

    Area of Science:

    • Microbiology
    • Otolaryngology
    • Infectious Diseases

    Background:

    • Otitis media and otitis externa are common ear infections.
    • Acinetobacter species are increasingly recognized as opportunistic pathogens.

    Purpose of the Study:

    • To identify and characterize Acinetobacter-like organisms isolated from human ear infections.
    • To determine the potential pathogenicity of these isolates in otitis media and otitis externa.

    Main Methods:

    • Bacterial isolation from patient ear swabs and normal ear surveys.
    • Identification of isolates using phenotypic and potentially genotypic methods.
    • Comparison with reference strains for accurate taxonomic classification.

    Main Results:

    • Fifty-seven strains were isolated from patients with ear infections and one from a normal ear.
    • 32 isolates identified as Acinetobacter anitratus, 22 as Acinetobacter lwoffii.
    • Three isolates were Moraxella spp. and one was Achromobacter sp.

    Conclusions:

    • Acinetobacter anitratus and Acinetobacter lwoffii are frequently found in ear infections.
    • Most isolated Acinetobacter strains appear to be commensal, but some may be pathogenic in otitis cases.

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