Table I.

Results of the invasion and proliferation assay performed with gfp-producing Salmonella. The results show a representative of two independent experiments conducted in threefold. The number of cell-associated bacteria was counted in 100 macrophages. The results represent the mean bacterial count per macrophages ± standard error of the mean (sem) after invasion (0 h) and after proliferation (6 h), as well as the proliferation rate.