FIG 6 .

Deletion of the CRISPR-induced, phage-related genes restores biofilm formation and swarming motility in the PS-CKOn background. (A) Biofilm assays for the indicated strains are shown. Error bars represent standard deviations of the results of at least three biological replicates, with representative wells shown at the top of the panel and with a single asterisk (*) and two asterisks (**) representing P values of <0.05 and <0.01, respectively, compared to the WT as determined with a Student’s t test. (B) The strains indicated in panel A were inoculated on Congo red plates, grown for 16 h at 37°C followed by incubation at room temperature for 48 h, and imaged. A darker center is indicative of increased polysaccharide production. (C) The indicated strains were assessed for swarming as described in the text.