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Whither triclosan?

A D Russell1

  • 1Welsh School of Pharmacy, Cardiff University, Cardiff CF10 3XF, UK. russellD2@cardiff.ac.uk

The Journal of Antimicrobial Chemotherapy
|April 10, 2004
PubMed
Summary
This summary is machine-generated.

Triclosan effectively inhibits bacterial growth, acting as a bacteriostatic agent at low doses and bactericidal at higher concentrations. While laboratory studies show potential links to antibiotic resistance, real-world data does not support this association.

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Area of Science:

  • Microbiology
  • Pharmacology

Background:

  • Triclosan is a broad-spectrum antimicrobial agent with established uses.
  • Understanding its mechanisms of action and resistance is crucial for its appropriate application.

Purpose of the Study:

  • To review the antimicrobial activity of triclosan.
  • To elucidate the mechanisms of triclosan action and resistance.
  • To assess the link between triclosan usage and antibiotic resistance.

Main Methods:

  • Literature review of triclosan's antimicrobial properties.
  • Analysis of studies on triclosan's mechanism of action (FabI inhibition, membrane effects).
  • Evaluation of data on triclosan resistance mechanisms (mutations, efflux).
  • Review of environmental surveys on triclosan usage and antibiotic resistance.

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Main Results:

  • Triclosan exhibits bacteriostatic and bactericidal effects against various bacteria, with notable resistance in Pseudomonas aeruginosa.
  • Methicillin-resistant Staphylococcus aureus is inhibited at 0.1-2 mg/L.
  • Inhibition of enoyl reductase (FabI) and membrane destabilization are key mechanisms.
  • Resistance can develop via FabI alterations, impermeability, or efflux.
  • Laboratory findings on antibiotic resistance association are not supported by environmental surveys.

Conclusions:

  • Triclosan possesses significant antimicrobial activity through specific biochemical pathways.
  • While resistance mechanisms exist, widespread antibiotic resistance linked to triclosan use is not substantiated by current environmental data.
  • The focus should be on preserving essential triclosan applications while phasing out non-critical uses.