| determination of relationships among non-toxigenic vibrio cholerae o1 biotype el tor strains from housekeeping gene sequences and ribotype patterns. | sequencing of three housekeeping genes, mdh, dnae and reca, and ribotyping for seven non-toxigenic vibrio cholerae o1 strains isolated from different geographic sources indicate a phylogenetic relationship among the strains. results of mlst and ribotyping indicate a clear difference between three toxigenic strains (n16961, o395, and 569b) and three non-toxigenic strains from india (gs1, gs2, and gw87) and one guam strain (x392), the latter of which were similar in both mlst and ribotyping, while ... | 2009 | 19028569 |