TABLE 4.

Clinical illness due to PA2 in mice cocolonized by 0.1229 or its derivatives

Infection	No. moribund or dead mice/total no. of mice by 7 days p.i.	% of moribund or dead mice
PA2 alone	4/28	14
0.1229 + PA2	14/36	39
0.1229ΔmctAB + PA2	2/11	18
0.1229ΔB17 + PA2	2/6	33
0.1229ΔB17ΔmctAB + PA2	0/12	0