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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)...
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