FIG 1.

Viable-cell counts of A. baumannii C4 (■) and P. aeruginosa PAO1 (◆) from (a) pure cultures and (b) mixed-culture biofilms. A. baumannii C4 and P. aeruginosa PAO1 were cocultivated in LB to form batch biofilms at 37°C. The cells were harvested from the biofilm in a water bath sonicator at the indicated times. Viable-cell counts were obtained by spread plating appropriate dilutions on LB plates containing amikacin (100 μg/ml) and Pseudomonas agar plates (containing 0.03% cetrimide [wt/vol]), respectively. Data are means from three experiments.