Characterization of Extended-Spectrum β-Lactamase-Producing Shigella sonnei in Spain: Expanding the Geographic Distribution of Sequence Type 152/CTX-M-27 Clone.

We describe the first occurrence in Spain of community cases of CTX-M-27-producing Shigella sonnei sequence type 152 (ST152), resistant to quinolones and azithromycin. The cases included adult males and also one pediatric case. The isolates were clustered together with an Australian isolate and differed from other outbreak-causing strains in England by more than 50 alleles. They carried the bla CTX-M-27 gene on an 83-Kb F2:A-:B- plasmid, similar to that found in a British isolate.