Exploring the Contribution of the AcrB Homolog MdtF to Drug Resistance and Dye Efflux in a Multidrug Resistant Isolate.

In , the role of RND-type drug transporters other than the major efflux pump AcrB has largely remained undeciphered (particularly in multidrug resistant pathogens), because genetic engineering in such isolates is challenging. The present study aimed to explore the capability of the AcrB homolog MdtF to contribute to the extrusion of noxious compounds and to multidrug resistance in an clinical isolate with demonstrated expression of this efflux pump. An / double-knockout was engineered, and susceptibility changes with drugs from various classes were determined in comparison to the parental strain and its and single-knockout mutants.