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The role of alginate and Psl in stress resistance of mixed species biofilms. Three species biofilms were formed for 4 days and exposed to 0.1% SDS for 2 h. The biofilm biovolumes of P. aeruginosa mucA (left), psl (right), Pf-5, and KP-1 were determined by quantitative image analysis before and after SDS treatment. Statistical analysis was performed vs. the corresponding WT samples grown in parallel, which were very similar in all cases ****P < 0.0001.
