Fig 6.

The motility defect of double yhjH and ycgR mutants is rescued by inactivation of cellulose production. (A) Representative swimming motility plates after incubation at 23°C for 16 h. (B) Quantitative measurement of motility. The total area of growth was measured, and the percent motility relative to that of the parental strain was calculated. Means and standard deviations of results from three repeats on three separate days are shown. Inactivation of ycgR is able to substantially but not totally restore the bacterial motility defect of S. Enteritidis or S. Typhimurium ΔyhjH mutants. An additional mutation of the cellulose synthase-encoding gene, bcsA, leads to a total recuperation of wild-type motility in both Salmonella species.