“…Colistin caused a significant up-regulation of the PA14 genes PA14_22420, PA14_22740, PA14_28410, mexF, mexE, PA14_32480, PA14_32490, PA14_39060, PA14_39420, PA14_41990, PA14_56620, PA14_56640, and PA14_64530 (Table 1 and Supplementary Table 1), all of which belong to the MexT regulon (Tian et al, 2009a;Hill et al, 2019). MexT is a transcriptional regulator of the LysR family known to control the expression of pathogenicity, virulence and antibiotic resistance determinants in Pae (Köhler et al, 1997a(Köhler et al, ,b, 1999Tian et al, 2009a;Huang et al, 2019).…”