IL-8 levels after co-incubation of L. lactis strains with Caco-2 cells. (A) L. lactis cells. (B) L. lactis supernatant. Dash, without addition of IL-1β or bacteria; IL-1β, only IL-1β was added; GM17, only the medium was added. Bars represent the mean and the MSE of three independent experiments. *, p < 0.05.