Figure 1.

(A) Colonization of E. coli O157:H7 strain 933 in fecal samples collected from infected DB rabbits. The identification numbers of the infected animals (nos. 61, 62, 65, 66, and 68) are indicated. The control animals (nos. 63 and 64) showed no infection with strain 933 (limit of detection, 10² cfu). (B) Colonization of E. coli O157:H7 strain 933 in fecal samples collected from infected NZW rabbits. The identification numbers of the infected animals (nos. 169, 171, 172, 175, and 176) are indicated. We were unable to determine the level of strain 933 in the feces of infected rabbit 170, which shed high numbers of a sorbitol fermentor during the study. The 2 control animals (nos. 173 and 174) showed no infection with strain 933 (limit of detection, 10² CFU).