quorum sensing

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quorum sensing

n.
A phenomenon in which a population of bacteria produces and responds to intercellular chemical signals whose concentration indicates the density of the population. When the density reaches a certain level, genes are expressed that allow for coordinated group behavior, as in bioluminescence or the formation of biofilms.
References in periodicals archive ?
La comunicacion quorum-sensing es uno de los mecanismos propuestos en el desarrollo y organizacion de la biopelicula, como es el caso de los sistema quorum sensing LasR/LasI y RhlR/ Rhll que facilita la formacion de biopelicula (Krishnamurthy et al.
Upon reaching a sufficient cell density on the intestinal mucosa, the Agr-like quorum-sensing system is triggered, which in turn up-regulates the VirR/VirS regulon.
All strains also contained RNAIII, which is the quorum-sensing effector (9).
Inhibition of quorum-sensing and related virulence factors of P.
McLean and Clay Fuqua, "Biofilms on Indwelling Urethral Catheters Produce Quorum-Sensing Signal Molecules In Situ and In Vitro", Applied and Environmental Microbiology, Sep 1998, 64(9): 3486-3490.
Degradation of Pathogen Quorum-Sensing Molecules by Soil Bacteria: a Preventive and Curative Biological Control Mechanism.
Obtained results in this area revealed that the bacterial quorum-sensing system, especially autoinducer molecules, can be considered as a novel candidate for vaccine development against P.
Phenolic components of ginger (Zingiber officinale), for example gingerol, shogaol and zingerone, have exhibited quorum-sensing inhibitory activity (QSI) against Chromobacterium violaceum and Pseudomonas aeruginosa, (2) Chemical modification of shogaol to azashogaol and an isoxazoline derivative of gingerol were prepared, both of which exhibited good QSI activity.
qRT-PCR was used to investigate the transcription levels of curli genes (csgA and csgB), motility genes [flhD and motB), Shiga-like toxin genes (stxl and stx2), and quorum-sensing genes (IsrA and luxS) in E.
Production of acyl-homoserine lactone quorum-sensing signals by gram negative plant-associated bacteria.