[Quorum sensing and its roles in pathogenesis among animal-associated pathogens--a review].

Quorum sensing (QS) is a phenomenon that microbes regulate some of their genes by signals related to the density of population. It is confirmed that acyl-homoserine lactones (AHL), some peptides, some furanones and some other small moleculars can be used as quorum-sensing signals by microbes. Microbes control their physiology with different QS systems in parallel or hierarchical ways. A lot of microbial pathogenesis connect with quorum sensing...