Abstract
Quorum sensing (QS) refers to chemical signalling between micro-organisms and defines a social concord among them. Once a threshold of signal is accumulated, certain virulent traits are regulated within bacteria in response to the surrounding environment. These virulence traits are known to contribute in the pathogenicity of bacterial diseases. To prevent the activation of virulence factors, QS is inhibited in different ways through a strategy known as quorum quenching. Various types of quorum-quenching strategies have already been used and characterized, as discussed in this review. The phenomenon of quorum quenching has long been considered as an alternative therapy to circumvent the ill-effects of the overuse of antibiotics. Considering the need to compare and evaluate various strategies, selected quorum-quenching paradigms are detailed along with their pros and cons in this review. A rationale has been drawn between naturally evolved quorum-quenching strategies and synthetically modified approaches adopted to abrogate QS.
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