We identified an increasing trend of XDR strains of S. sonnei and found XDR S. sonnei isolated from MSM almost exclusively had the bla CTX-M-27 gene variant, whereas XDR S. sonne i isolated from travelers returning from high-risk regions almost exclusively had the bla CTX-M-15 gene variant ( 24 ).
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Epidemiologic and Genomic Investigation of Sexually Transmitted Shigella sonnei, England.
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