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Chlorhexidine resistance and the lipids of Providencia stuartii

B Thomas, D J Stickler

    Microbios
    |January 1, 1979
    PubMed

    Insights

    Providencia stuartii strains resistant to chlorhexidine antiseptic showed no differences in lipid content compared to sensitive strains. Resistance is not due to reduced antiseptic absorption or degradation.

    Area of Science:

    • Microbiology
    • Antimicrobial Resistance

    Background:

    • Providencia stuartii shares lipid similarities with Proteus mirabilis.
    • Some strains of P. stuartii exhibit resistance to high chlorhexidine concentrations.

    Purpose of the Study:

    • To investigate the mechanisms behind chlorhexidine resistance in Providencia stuartii.
    • To determine if lipid composition differences explain antiseptic resistance.

    Main Methods:

    • Comparative analysis of lipid content between sensitive and resistant strains.
    • Assessment of chlorhexidine adsorption to bacterial cells.
    • Evaluation of antiseptic enzymic degradation by bacterial strains.

    Main Results:

    • No significant differences in lipid composition were found between chlorhexidine-sensitive and resistant P. stuartii strains.
    • Reduced adsorption of chlorhexidine to resistant strains was not observed.
    • Gross enzymic degradation of chlorhexidine by resistant strains was not evident.

    Conclusions:

    • Lipid content differences do not explain chlorhexidine resistance in P. stuartii.
    • Resistance is not mediated by reduced antiseptic uptake or enzymatic breakdown.

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