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BackgroundPseudomonas aeruginosa have been delineated for its disreputable charisma in nosocomial infections leading to pulmonary pneumonia. The recent developments in multi-drug resistance accelerate the need of alternative antibacterial strategies. In this study we analysed the efficacy of quorum quenching mediated bacterial silencing in effective immunological clearance upon pulmonary infected rat models.ResultsQuorum sensing inhibitor was extracted from Solanum torvum which is a native plant in Kerala, India. The in vitro pilot studies upon Pseudomonas aeruginosa strain jb07 revealed the ability of Solanum torvum root extract (STRE) to successfully inhibit quorum sensing controlled virulent factors such as chromogenesis and biofilm formation; though the bacterial growth was unaffected. In vivo analysis upon Sprague Dawley rats shown the potential of STRE in aiding successful bacterial clearance where in cent percentage of survival was evident that compared with untreated group. Subjects treated with STRE possessed natural immunological response with inflammation, MNC infiltration and BALT (bronchus associated lymphoid tissue) hyperplasia unlike the Ciprofloxacin treated comparative group.ConclusionsThe observations of this study suggests that STRE is not having any bactericidal activity rather its silencing the infectant in a system which in turn disables the virulence of bacteria and remain attenuated; therefore immune system get adequate time for successful countermeasures.

clinical phytoscience

Quorum quenching intervened in vivo attenuation and immunological clearance enhancement by Solanum torvum root extract against Pseudomonas aeruginosa instigated pneumonia in Sprague Dawley rats