TABLE 3.

Colonization by PA2 in mice cocolonized by 0.1229 and derivatives

Cocolonizing strain	No. of mice in group	No. of mice colonized	% of mice colonized
0.1229	36	6	17
0.1229ΔmctAB	11	0	0
0.1229ΔB17	6	0	0
0.1229ΔB17ΔmctAB	12	0	0
None	28	28	100