Differentiation of qacAand qacBusing high-resolution melt curve analysis, and both qacAand qacBbut not qacCor norAtypes increase chlorhexidine minimal inhibitory concentrations in Staphylococcus aureusisolates

Chlorhexidine is one of the most essential ingredients in infection control applications. Except qacA, the effects of other various efflux-medicated biocide genes (including qacB, qacC, qacEΔ1, qacHor norA) on biguanides resistance are still controversial. In addition, most of the studies have discussed the effect of qacA/Bon clinical S. aureusisolates but not that qacAor qacBindividually.