Trends in multidrug resistance among Escherichia coli and klebsiellae in Germany M. Kresken* 1,2 , D. Hafner 2,3 1 Antiinfectives Intelligence GmbH, Rheinbach, Deutschland 2 Paul-Ehrlich-Gesellschaft für Chemotherapie e.V., Rheinbach, Deutschland 3 Institute for Pharmacology and Clinical Pharmacology, Heinrich-Heine-University, Düsseldorf, Deutschland Introduction: Escherichia coli (ECO) and klebsiellae are among the most common pathogens causing infections in in-and outpatients.