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Related Experiment Videos

Gonococcal opacity variants: susceptibility to antimicrobial agents.

I E Salit, M Bond

    Antimicrobial Agents and Chemotherapy
    |September 1, 1982
    PubMed
    Summary
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    Antimicrobial susceptibility testing for gonococci (Neisseria gonorrhoeae) does not require differentiating between opaque and transparent colony variants. Most variants showed similar minimal inhibitory concentrations, simplifying routine testing procedures.

    Area of Science:

    • Microbiology
    • Bacteriology
    • Antimicrobial Resistance

    Background:

    • Neisseria gonorrhoeae exhibits colony opacity variation.
    • Opacity variants may differ in virulence and antimicrobial susceptibility.
    • Standardized susceptibility testing protocols are crucial for effective treatment.

    Purpose of the Study:

    • To determine if opacity variation in gonococci affects antimicrobial susceptibility testing.
    • To evaluate the necessity of variant selection for routine antimicrobial susceptibility testing.

    Main Methods:

    • Tested susceptibility of 34 isogenic opaque and transparent gonococcal variants.
    • Utilized nine different antimicrobial agents.
    • Determined minimal inhibitory concentrations (MICs) for each variant-agent combination.

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    Main Results:

    • Minimal inhibitory concentrations (MICs) were discordant in only 20% of opaque and transparent variant pairs.
    • No significant differences were observed in the mean MICs between opaque and transparent variants.
    • Opacity variation did not substantially impact susceptibility to the tested agents.

    Conclusions:

    • Selection of specific opacity variants is not required for routine gonococcal antimicrobial susceptibility testing.
    • Simplified testing protocols can be employed without compromising accuracy.
    • This finding aids in streamlining gonococcal infection management and surveillance.