Fig. 3From: Evolutionary diversification of Pseudomonas aeruginosa in an artificial sputum modelPhage resistance of endpoint isolates to LESφ2-4. Bars are coloured according to the particular phage combination to which resistance was observed. High titre pure phage stocks were spotted onto a soft-agar lawn of each isolate and scored as resistant if no lysis was observed after overnight incubation at 37 °CBack to article page