High expression of acrAB gene leads to multiple antibiotic resistance in clinical strains of Escherichia coli , and Mar operon may contribute to the regulation of acrAB gene expression.

• 主动外排系统acrAB的高表达导致临床分离大肠杆菌产生多重耐药性 ; acrAB的表达可能受多重耐药操纵子调控。