Multilocus sequence typing analysis of Shigella flexneri isolates collected in Asian countries

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Abstract
The multilocus sequence typing scheme used previously for phylogenetic analysis of Escherichia coli was applied to 107 clinical isolates of Shigella flexneri. DNA sequencing of 3423 bp throughout seven housekeeping genes identified eight new allele types and ten new sequence types among the isolates. S. flexneri serotypes 1–5, X and Y were clustered together in a group containing many allelic variants while serotype 6 formed a distinct group, as previously established.