FIGURE 2.

Disruption of speA decreased bacterial swarming motility and biofilm formation. (A) Swarming motility of strain EC1and its derivatives, the diameters were measured after incubation for 18 h at 28°C. (B) Biofilm formation of wild type and its derivatives. Bacterial strains were grown in SOBG medium at 28°C with shaking at 150 rpm for 18 h, and the medium without inoculation was used as a blank control (CK). The data shown are the means ± SE (n = 3). ^**** P < 0.0001, ^∗∗∗P < 0.001.