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PCR detection of Serratia spp. using primers targeting pfs and luxS genes involved in AI-2-dependent quorum sensing.

Research paper by Hu H Zhu, Shu-Jing SJ Sun, Hong-Yue HY Dang

Indexed on: 16 Jul '08Published on: 16 Jul '08Published in: Current Microbiology



Abstract

Quorum sensing is the ability of bacteria to communicate and coordinate behavior emitting signaling molecules. A series of primers for PCR detection of Serratia spp. has been designed using as targets the pfs and luxS genes involved in AI-2-dependent quorum sensing. The identities of the PCR products (193 and 102 bp) were confirmed by commercial sequencing. Twenty-seven Serratia strains (representing 10 different species) tested positive for the presence of the pfs and luxS genes, while a total of 7 different species of non-Serratia (25 strains) were tested and gave negative results. The sensitivity and specificity of the pfs- and luxS-based PCR assay were also checked in artificially contaminated bacterial samples. In this study we established a novel method to detect Serratia using quorum-sensing genes as diagnostic markers.