FIG 6.

Survival of S. maltophilia wild-type and virB10 mutant strains when cocultured with heterologous bacteria. S. maltophilia (Sm) K279a (WT), virB10 mutant NUS15 (virB10), or complemented mutant NUS15(pvirB10) (virB10/virB10+) was mixed with E. coli strain DH5α (Ec) (A), K. pneumoniae strain KPPR1 (Kp) (B), or P. aeruginosa strain 7700 (Pa) (C) at ratios of ∼200:1, 150:1, 100:1, and 50:1, spotted onto LB agar. After 24 h of incubation, the numbers of each strain were determined by plating serial dilutions of the bacterial growth area on selective media. Results are presented as the ratios of S. maltophilia CFU to the CFU of other species at t = 0 and t =24 h. The dagger symbols indicate when the ending ratio was <5. Asterisks denote significant differences in the ratio at t = 0 h compared to the ratio at t = 24 h (*, P < 0.05; **, P < 0.01). Data are presented as the means and standard deviations of results from three independent experiments (n = 3 each).