Phenotypic and genotypic characterization of Shigella sonnei carrying the extended-spectrum beta-lactamase CTX-M-27. A report of two cases in Spain in men who have sex with men

1. Fernández Vecilla, D.
2. Zugazaga Inchaurza, K.
3. Lombide Aguirre, I.
4. Díaz de Tuesta del Arco, J.L.