Alternative Strategies to Regulate Quorum Sensing and Biofilm Formation of Pathogenic Pseudomonas by Quorum Sensing Inhibitors of Diverse Origins

  • P. Sankar Ganesh
  • V. Ravishankar Rai


Pathogenic Pseudomonas species produce virulence elements and form biofilm through quorum sensing (QS) system. Clinical infections caused by Pseudomonas aeruginosa are becoming increasingly tough to treat on account of wide spread drug resistance. The drugs have lost their efficacy due to the virulence elements and biofilms, which are responsible for increased severity of the infection. The search for novel drugs has increased and novel modes of action against Gram-negative pathogenic bacteria are been much more of important. Plants secondary metabolites are widely used for treating the many bacterial diseases. Plant-derived anti-QS and anti-biofilm compounds that do not negatively affect the growth of the bacterial cells, but rather attenuates the QS controlled virulence factors, that might allow the host defense to act more effectively to washout the P. aeruginosa infection. In this review mainly focus on overview of pathogenicity, QS controlled virulence factors and biofilm formation of P. aeruginosa infection. This review describes a brief account of QS inhibitors and anti-biofilm compounds, which exhibit alternative medicine possible for treating drug resistant P. aeruginosa.


Infections Pseudomonas aeruginosa Cell to cell communication Biofilm Phytochemical Virulence factors Caenorhabditis elegans 



N-acyl homoserine lactone


Acquired immune diseases



C12 – HSL

N-dodecanoyl-homoserine lactone


N-butyrl –L-homosrine lactone


Cerebrospinal fluid


Carbon dioxide


N-3-oxo-dodecanoyl-homoserine lactone


Exopolymeric substance


External ventricular drainage


Hydrogen cyanide


Intensive care unit


Quorum sensing


Quorum sensing inhibitor


S-adenosyl methione


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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • P. Sankar Ganesh
    • 1
  • V. Ravishankar Rai
    • 1
  1. 1.Department of Studies in MicrobiologyUniversity of MysoreMysoreIndia

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