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Folia Microbiologica

, Volume 47, Issue 4, pp 379–384 | Cite as

Effect of outer-membrane permeabilizers on the activity of antibiotics and plant extracts againstPseudomonas aeruginosa

  • A. Guha
  • A. Choudhury
  • B. G. Unni
  • M. K. RoyEmail author
Papers

Abstract

Several known outer membrane permeabilizers increased susceptibility of a highly resistant pathogenic strainPseudomonas aeruginosa to different antibiotics and plant extracts. Of all the chemicals tested, EDTA, sodium citrate and sodium hexametaphosphate (HMP) were found to be potent permeabilizers as shown by enhanced lysis of the bacteria in the presence of lysozyme. In the presence of EDTA and sodium citrate susceptibility of the strain to gentamicin and rifampicin increased markedly. The strain was resistant to vancomycin but became susceptible when grown in the presence of increasing amounts of EDTA and sodium citrate. Similar results were obtained for erythromycin when treated with sodium citrate. EDTA was found to be most potent permeabilizer in enhancing the activity of the plant extracts. Though HMP was an effective permeabilizer it had a weak or no effect on the activity of the antibiotics and plant extracts.

Keywords

Vancomycin Lysozyme Plant Extract Sodium Citrate Diuron 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Institute of Microbiology, Academy of Sciences of the Czech Republic 2002

Authors and Affiliations

  • A. Guha
    • 1
  • A. Choudhury
    • 1
  • B. G. Unni
    • 1
  • M. K. Roy
    • 1
    Email author
  1. 1.Biochemistyr DivisionRegional Research LaboratoryJorhatIndia

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