Figure 3. Effect of three sub-inhibitory concentrations of NaCl against P. aeruginosa CF isolate biofilm biomass formation.

Tested for 55 adherent CF isolates of P. aeruginosa with MIC values > 3% distributed as follows: strongly adherent (n = 13, violet bars), moderately adherent (n = 15, green bars), weakly adherent phenotype (n = 27, blue bars). Prevention of biofilm biomass formation is presented as percentage of strains for which ability to form biofilm biomass was decreased by at least 25% compared to controls (not exposed).