Nosocomial and community infections due to class A extended-spectrum β-lactamase (ESBLA)-producing Escherichia coli and Klebsiella spp. in southern Brazil

od Claudia Wollheim, Ivani Maria F Guerra, Vania D Conte, Sheila P Hoffman, Fernando J Schreiner, Ana Paula L Delamare, Afonso L Barth, Sérgio Echeverrigaray, Sérgio Olavo P da Costa