Increasing prevalence of amoxycillin Á/clavulanate-resistance among E. coli strains in a Hungarian university hospital PM104 Veréb I, Vígh A, Urbán E, Hajdú E, Nagy E. Department of Clinical Microbiology, University of Szeged, Szeged, Hungary Background: Amoxicillin Á/clavulanate resistance (ACR) is an emerging problem in Escherichia coli as reported from different parts of Europe.