FIGURE 5.
Secretion of IL-1b, IL-6, IL-10, and IL-12b by ICE-1 cells exposed to wild-type S. Enteritidis (light gray bars) and S. Enteritidis fimH::kan mutant strain (dark gray bars) at MOI 100:1. After 6 h incubation, the culture supernatants were collected and analyzed for the presence of interleukins by ELISA. Interleukin levels were normalized against unstimulated cells. Data represent the mean ± SD of four independent experiments, and were analyzed in each experiment to confirm accuracy and reproducibility of ELISA. Values marked with ∗ differ significantly (P < 0.05).