Eight Gram-negative bacteria are 10 000 times more sensitive to cationic detergents than to anionic detergents

Soumitra Rajagopal, Nicole Eis, Kenneth W. Nickerson

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

In liquid culture, eight typical Gram-negative bacteria were ca. 10 000-fold more sensitive to cationic detergents than to the anionic detergent sodium dodecyl sulfate. Cetyltrimethylammonium bromide (CTAB) was inhibitory at concentrations ranging from 0.0006% to 0.01%. Four pseudomonads able to form biofilms were ca. 1000-fold more resistant to CTAB on Luria-Bertani agar plates than they were in liquid culture. A las1 mutant of Pseudomonas aeruginosa was only able to tolerate 0.1% CTAB on Luria-Bertani agar plates but could tolerate 5% CTAB when supplemented with homoserine lactone containing culture supernatants.

Original languageEnglish (US)
Pages (from-to)775-779
Number of pages5
JournalCanadian journal of microbiology
Volume49
Issue number12
DOIs
StatePublished - Dec 2003

Keywords

  • Bacterial detergent resistance
  • Cetyltrimethylammonium bromide
  • Homoserine lactones
  • Pseudomonas biofilms
  • Sodium dodecyl sulfate

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Applied Microbiology and Biotechnology
  • Molecular Biology
  • Genetics

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