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Fig. 2 | BMC Microbiology

Fig. 2

From: Effect of subinhibitory exposure to quaternary ammonium compounds on the ciprofloxacin susceptibility of Escherichia coli strains in animal husbandry

Fig. 2

Flow cytometric DIBAC4 (3) (FITC-A)/PI (PC5.5A) dot plots representing Escherichia coli viability through membrane potential and membrane integrity of a ciprofloxacin (CIP)-susceptible (a) and CIP-resistant (b) Escherichia coli strain after treatment with three increasing CIP concentrations either with or without benzalkonium chloride (BKC) exposure. The green region corresponds to the live subpopulation with an intact membrane and normal membrane potential, the blue region corresponds to the intermediate subpopulation with different degrees of compromised membranes and loss of membrane potential, the red region corresponds to the dead subpopulation with irreversibly damaged membrane and complete loss of membrane potential. Percentages are the mean of triplicate experiments

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