FIG. 3.
Virulence of C. rodentium wild-type (ICC169) (solid symbols) and ΔespJ mutant (ICC189) (open symbols) strains in individual C57BL/6J mice as determined by viable counts in stools (A) and organ homogenates (B). *, significant differences were found in the viable counts obtained from ICC169- and ICC189-infected mice recovered from colons on day 14 postinfection. Twenty days postinfection, mice infected with wild-type C. rodentium had completely cleared infection in both the cecum and colon, while three of five and four of five mice infected with ICC189 still had bacteria present within the colonic mucosa and cecum, respectively.