FIG. 3.

Effects of cdpA mutation on Congo red binding and formation of cell aggregates by B. pseudomallei. Increased production of exopolysaccharides was observed in the cdpA mutant which bound more CR (B) compared to the wild type (A) and complemented cdpA mutant (C). Bacterial cells of the cdpA mutant were also more adhesive, forming cell aggregates which sedimented to the bottom of the tube after 24 h static culture in LB broth (E). In comparison, the wild-type bacteria (D) and the complemented cdpA mutant (F) remained mostly in suspension in static broth cultures.