Extended-spectrum β-Lactamase Acquisition in Patients Receiving Systemic Cephalosporin Treatment for Salmonella spp. and Shigella spp. Infection. (4th June 2019) - Spellerberg, Barbara; Rabsch, Wolfgang; Pietsch, Michael; Denzer, Christian; Posovszky, Carsten; Essig, Andreas; Pfeifer, Yvonne