“…As a consequence, they retain activity against a wide variety of multiply resistant pathogens, especially cephalosporin‐resistant Gram‐negative bacteria. This is of importance, as the incidence of strains expressing ESBLs (and often more than one ESBL per organism) is increasing [5–8]. For example, the Paul‐Ehrlich‐Society’s multicentre survey on resistance, which has been conducted on a regular basis since 1975, reported, for the years 2001 and 2004, ESBL phenotypes in 1.8% and 5.1% of Escherichia coli, in 12.7% and 7.3% of Klebsiella pneumoniae, and in 5.3% and 12.4% of Klebsiella oxytoca isolates, respectively [9].…”