Interestingly, this phenotype was only observed in the non-mucoid P. aeruginosa variant (PAO1) known to express Psl on its cell wall surface, as CF-ALF exposed mucoid P. aeruginosa variant expressing alginate (PDO300) did not further increase the release of ROS by neutrophils (Fig. 3e). This evidence concerns the gene SMOX and cystic fibrosis.