Figure 3From: Deletions in the pyruvate pathway of Salmonella Typhimurium alter SPI1-mediated gene expression and infectivityInvasion of THP-1 cells by opsonized Salmonella Typhimurium strains. Time-points of 1, 4, 18, 24, and 48Â h post-infection are shown. The X-axis represents time (h) while the Y-axis represents average colony forming units (CFU) of bacteria per viable THP-1 cell. The different Salmonella strains are color-coded according to the legend.Back to article page