Table 1.

Colistin resistant strains respond well to the MarR inhibitor by altering cell surface charge.

Strains	Groups	Zeta potential (mV)
U3790	UT	−29.8
	Salicylate Treated (5 mM)	−36.6
U3176	UT	−36.5
	Salicylate Treated (5 mM)	−39.5
MG1655	UT	−48.2
	Salicylate Treated (5 mM)	−46.4

Resistant and reference strains of E. coli (10⁹ cells) were treated with 5 mM of salicylate for 20 min at 37 °C, harvested and 10⁸ cells were measured to obtain the zeta potential.