Fig. 5.
Phagocytosis of detached 5-h E. coli RP437/pBAD-mPlum biofilm cells. The graph shows the percentage of killing after incubating with macrophage U-937 (attached on 5:1, 20:1 or 40:1 PDMS surfaces first) for 90 min in RPMI medium supplemented with 10% FBS at 37°C and 5% CO2 (r=0.62, p=0.07, Pearson correlation analysis).