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. 2014 Sep 8;9(9):e107186. doi: 10.1371/journal.pone.0107186

Figure 1. Colonization of P. aeruginosa biofilms by E. coli in R2A medium in a microfluidic flow cell.

Figure 1

E. coli appears red and P. aeruginosa appears green or yellow. A) E. coli deposited on 3-day old P. aeruginosa biofilm (grid unit is 23.8 µm). B) Resulting mixed E. coli – P. aeruginosa biofilm on day 6 (grid unit is 23.8 µm). C) Horizontal section near the base of the biofilm and vertical sections of the biofilm shown in panel B (scale bar = 20 µM). D) P. aeruginosa and E. coli biomass in mixed biofilms on day 6 compared with biomass of 6-day old mono-cultured P. aeruginosa biofilms.