FIG. 1.

Time course of I_SC and R^t after coincubation of HT-29/B6 monolayers with Aeromonas. Pathogenic (strain Sb) or apathogenic (strain Ha) aeromonads were added to the mucosal bathing solution to yield an initial concentration of 10⁵ CFU/ml. Registration was then started. After a 90-min latency period, the pathogenic strain Sb induced a marked increase in I_SC (upper panel) and a decrease in R^t (lower panel). In contrast, the apathogenic strain Ha left I_SC and R^t unaltered over the whole 5-h registration period. Values are means ± the standard error of the mean (SEM) of six monolayers for each group.