Increasing prevalence and diversity of ESBL/AmpC-type -lactamase genes in Escherichia coli isolated from veal calves from 1997 to 2010

Abstract

The prevalence and molecular diversity of genes encoding cefotaxime resistance in E. coli isolated from veal calves over a 14 year period showed an increasing trend. From 2005 onwards, blaCTX-M genes were most abundant, especially blaCTX-M-1.