Quorum Sensing is term to describe the phenomenon whereby the accumulation of signaling molecules enable a single cell to sense the number of bacteria. There are many different bacteria living together which use various classes of signaling molecules in the natural environment. As they employ different languages they cannot necessarily talk to all other bacteria. Nowadays several quorum sensing systems are intensively studied in various organisms such as marine bacteria and several pathogenic bacteria. This review discusses some of the more significant break through in the areas of defining quorum sensing and harnessing quorum signaling for biotechnology that have appeared in the literature over the past few years. A hasty overview of quorum sensing mechanics is provided with greater deliberate of some of the specific functions carried out by extracellular signaling that have emerged recently.
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