TABLE 2.

espB is required for colonization of mice by C. rodentium^a

Inoculum	Log CFU/g of stool-filled colonb	nc
Sterile LB	0.00 ± 0.00	9
DBS100	8.95 ± 0.09	10d
DBS255	0.00 ± 0.00	6
DBS578	0.00 ± 0.00	10
DBS578/pJVN111	6.88 ± 0.14e	6
DBS587	9.03 ± 0.11	5d

^aThe experiment measuring the number of CFU in stool-filled colon on day 10 postinoculation was done twice, and the data presented in this table are a composite of the results of the two experiments. 

^bMean ± standard deviation; the lower limit of detection was 1 CFU/g. 

^cNumber of mice used. 

^dPrior to day 10, two mice infected with DBS100 and one mouse infected with DBS587 died. 

^eChloramphenicol-resistant counts only.