Taxonomy of clinical and biocontrol P. agglomerans sensu stricto strains based on pagRI gene sequences. The distance tree was generated with the Minimum Evolution method with the Maximum Composite Likelihood model using an 1168-bp fragment spanning the two genes. Sequences of autoinducer genes from related enterobacterial species P. stewartii pv. stewartii (genome project site http://www.hgsc.bcm.tmc.edu/microbial-detail.xsp?project_id=125), P. ananatis [GenBank accession AB304810] and S. proteamaculans [GenBank accession AY040209] were used as references. Nodal supports were assessed by 500 bootstrap replicates. Only bootstrap values greater than 50% are shown. The scale bar represents the number of substitutions per site.