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Techniques for anaerobic susceptibility testing

C Thornsberry

    The Journal of Infectious Diseases
    |March 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Accurate antimicrobial susceptibility testing for anaerobic bacteria relies on agar or broth dilution methods. For routine use, disk broth or category methods are recommended, while the Bauer-Kirby disk diffusion method is unsuitable for anaerobes.

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    Area of Science:

    • Microbiology
    • Clinical Pharmacy
    • Infectious Diseases

    Background:

    • Accurate antimicrobial susceptibility testing (AST) is crucial for guiding effective treatment of anaerobic bacterial infections.
    • Standardized methods for determining minimal inhibitory concentrations (MICs) of antimicrobial agents against anaerobic bacteria are essential for clinical decision-making.

    Purpose of the Study:

    • To outline recommended methods for determining antimicrobial susceptibility of anaerobic bacteria.
    • To advise against the use of specific methods that are inappropriate for anaerobic bacteria.

    Main Methods:

    • Agar dilution technique for MIC determination.
    • Broth dilution techniques, including microdilution, for MIC determination.
    • Disk broth and category methods as alternatives for routine susceptibility testing.

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    Main Results:

    • Agar and broth dilution methods are suitable for determining MICs of anaerobic bacteria.
    • Disk broth or category methods are recommended when routine MIC determination is not feasible.
    • The Bauer-Kirby disk diffusion method and its interpretative standards are not appropriate for anaerobic bacteria.

    Conclusions:

    • Standardized agar or broth dilution methods are the preferred techniques for accurate MIC determination in anaerobic bacteria.
    • Alternative methods like disk broth or category testing can be employed for routine susceptibility assessments.
    • The Bauer-Kirby disk diffusion method should be avoided for AST of anaerobic organisms due to unreliability.