Table 2.

Anchorage-independent growth in soft agar after infection with pks⁺ E. coli

Infection	CFU ± SE per 10,000 cells
CHO
Control	0.00
E. coli pks−	0.00
E. coli pks+	3.33 ± 0.41**
E. coli clbA	0.00
E. coli clbA + pclbA	4.33 ± 0.58**
IEC-6
Control	0.33 ± 0.25
E. coli pks−	0.00
E. coli pks+	10.33 ± 0.62**
HCT-116
Control	4.67 ± 0.36
E. coli pks−	2.67 ± 0.41
E. coli pks+	12.33 ± 0.41***

CHO, IEC-6, and HCT-116 cells were infected (MOI = 20) or left uninfected, then grown for 3 d before plating in 0.3% soft agar. Colonies (>50 cells) were counted after 7 d.

**P < 0.01 and ***P < 0.001 by ANOVA with Bonferroni posttest.