Figure 2.

The relative gene expression of 2 efflux pump genes, acrB and oqxB, and a transcriptional activator, ramA, was measured by using quantitative reverse transcriptase PCR and compared with the expression of a housekeeping gene, rpoB. The bar height represents the mean relative fold-change relative to the reference strain, K. pneumoniae BCRC 13883, in triplicate. The error bar represents the standard error with a 95% confidence interval compared to the reference strain. The asterisk (*) indicates a significant difference with p ≤ 0.05.