Fig 1.

Phage-mediated inhibition of group behaviors of PA14. (A and B) Group motilities of P. aeruginosa PA14 and its lysogens for temperate siphophages, with its isogenic mutants for pilA or flgK used as the negative controls. Photographs of swarming assay after 16 h of growth on M9 minimal media (A) and twitching assay after 48 h of growth on LB media (B) as described in Materials and Methods. (C, D, and E) Motilities of PA14 in the presence (+) or absence (no phage) of the siphophage strain (either MP22 or D3112) in the swimming (C), the swarming (D), and the twitching (E) assay plates.