Fig. 2From: Characterization of clinical extensively drug-resistant Pseudomonas aeruginosa in the Hunan province of ChinaThe relative expression of the mexA and oprD genes in the XDR-PA isolates. The relative expression levels are expressed as the mean ± standard error of the mean (SEM). *P values less than 0.05 are considered significant and are indicated by an asterisk Back to article page