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Biocide susceptibility and intracellular glutathione inEscherichia coli

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Journal of Industrial Microbiology

Summary

Inhibition of growth and speed of kill by biocides with different mechanisms of action was examined with respect to intracellular glutathione levels. strain deficient in intracellular glutathione was hypersusceptible to electrophilic biocides, with the exception of an isothiazolone biocide. Growth inhibition by quaternary ammonium compounds and radical-generating biocides was unaffected by intracellular glutathione levels. Speed of kill experiments demonstrated a faster rate of killing by formaldehyde in both log and stationary phase cultures of the glutathione-deficient strain as compared to its wild-type parent. Glutathione levels had no effect on the speed of kill by hydrogen peroxide in log phase cultures, but resulted in an increased rate of killing in stationary phase cultures. Stationary phase cultures of the glutathione-deficient strain were killed by a quaternary ammonium biocide at a slower than the glutathione-replete strain. These studies provide information about both the mechanism of action of biocides as well as the role of glutathione in determining microbicide susceptibility.

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Authors and Affiliations

  1. Rohm and Haas Co. Inc. Research Center, 727 Norristown Road, 19477, Spring House, PA, USA

    John S. Chapman, Megan A. Diehl & Richard C. Lyman

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  1. John S. Chapman
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  2. Megan A. Diehl
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  3. Richard C. Lyman
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Chapman, J.S., Diehl, M.A. & Lyman, R.C. Biocide susceptibility and intracellular glutathione inEscherichia coli . Journal of Industrial Microbiology 12, 403–407 (1993). https://doi.org/10.1007/BF01569672

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  • DOI: https://doi.org/10.1007/BF01569672

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