Fig. 3: Anti-Psl antibody binding.

SickKids P. aeruginosa isolates (N = 7 Persistent; N = 7 eradicated), EPIC P. aeruginosa isolates (N = 7 Persistent; N = 7 eradicated), laboratory P. aeruginosa strain PAO1 and Δpsl (Psl deficient PAO1) were grown as biofilms for 48 h then incubated for 90 min with fluorescently labeled monoclonal anti-Psl antibodies, A Psl0096, B WapR001, and C WapR016. The mean antibody fluorescence volume (µm3/100,000 µm3 biofilm) for each isolate (done in triplicate) was calculated and the mean of all isolates was plotted with standard error of the mean (SEM). Statistics were performed using non-parametric Mann–Whitney test ***p < 0.001, **p < 0.01, *p < 0.05, ns not significant.