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. 1971 Oct;108(1):482–491. doi: 10.1128/jb.108.1.482-491.1971

Antimicrobial Actions of Hexachlorophene: Cytological Manifestations1

J N Silvernale a,2, H L Joswick a,3, Thomas R Corner a, Philipp Gerhardt a
PMCID: PMC247089  PMID: 4107813

Abstract

Hexachlorophene is a soap-compatible bisphenol that has been widely used as an antiseptic, yet its mechanism of action is undefined. The relative threshold concentration for bactericidal effect on a susceptible test organism, Bacillus megaterium, was established to be about 10 μg/mg of cell dry weight. At this or at high (≥100 μg/mg) concentration, adsorptive uptake by cells displayed saturation kinetics. At about 30 μg/mg, the time course of adsorption occurred in three distinct stages. The triphasic pattern was interpreted to represent successive penetration of and adsorption by the cell wall, the protoplast membrane, and the cytoplasm. This interpretation was substantiated by determinations of hexachlorophene adsorption by isolated cell components. Electron microscopy disclosed cytopathology, evidenced as gaps or discontinuities, in the protoplast membrane (but not in the cell wall or cytoplasm) at > 30 μg of hexachlorophene per mg of cell dry weight. Similarly, treatment with > 30 μg/mg allowed a fluorescigenic dye (tolyl-peri acid) to penetrate into the protoplast. However, no detectable cytological manifestations were discerned at the minimum lethal concentration of 10 μg/mg. Apparently, hexachlorophene is physically disruptive at intermediate or high relative concentrations but acts in a more subtle fashion at the minimal lethal concentration.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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