Fig 3. Antibacterial activity of antibiotics and cationic polymer (Qn-prAP) against E. coli antibiotic-tolerant cells.
(A) Ampicillin (100 μg mL-1), kanamycin (100 μg mL-1) do not kill whereas Qn-prAP shows concentration dependent (10, 30 and 50 μg mL-1) elimination of E. coli antibiotic-tolerant cells. ~106 CFU mL-1 of bacteria in M9 media were treated with compounds for 2 h. Stars represent no survival detected (limit of detection < 50 CFU/mL).