FIG 2.

Quantification of prey survival and predator growth. (A) Prey and predator cells were mixed in a ratio of 50:1, plated onto CFL agar plates, and incubated at 32°C for 24 h. Prey and predator alone were used as controls. CFU were determined, and percent prey survival and percent predator growth were calculated relative to the controls. The majority of E. coli β2155 and B. subtilis OI1085 and 168 were consumed, whereas about 68% of B. subtilis NCIB3610 survived. (B) M. xanthus was able to grow significantly on E. coli β2155 and B. subtilis OI1085 but not the ancestral B. subtilis NCIB3610 strain.