Abstract
Aim: To study the influence of plant volatiles, bioactives and synthetic antibiotics on the attenuation of the quorum sensing (QS)-regulated virulence factors of Pseudomonas aeruginosa. Materials & methods: QS inhibition; the QS-regulated virulence factors pyocyanin, hemolysin, elastase, protease, alginate and pyochelin; and motility phenotypes were performed at sub-MIC to check the attenuation effect of 24 agents on the virulence of P. aeruginosa. Results: Eighteen out of 24 assayed compounds exhibited anti-QS activity and reduced the production of all virulence factors. Cinnamaldehyde, zingerone and lavender oil exhibited a significant reduction in motility phenotypes. Conclusion: Natural phytomolecules as a whole or their bioactives could be used to develop antivirulence drugs after in vivo evaluation.
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