FIG. 3.

Survival or growth of E. coli O157 in pancreatic juice following 30, 60, 90, and 120 min of prior exposure to gastric challenge under dynamic conditions. Values reported represent the average results of at least two independent experiments carried out in duplicate. Filled circles, open squares, open circles, and filled squares represent cells previously challenged in the gastric juice for 30, 60, 90, and 120 min. Bars represent standard deviations. Data represent total counts for injured and uninjured cells measured on MSA after resuscitation on TSA plates. For each gastric treatment, means bearing identical lowercase letters are not significantly different (P > 0.05). For each intestinal challenge time, means bearing identical uppercase letters are not significantly different (P > 0.05).