Figure 5.

STM3169 is a novel virulence protein. Competitive index was determined at 48 h after infection in the spleen (A). Effects of stm3169 disruption on the invasion (B) and the intracellular survival (C) in the mouse macrophage cell lines, RAW264.7. Cells treated with IFN-γ were infected with S. Typhimurium wild-type and the mutant strains at a multiplicity of infection of 1. At 2 h and 24 h after infection, macrophages were lysed and the bacterial number was determined. Asterisks indicate that differences were statistically significant (P < 0.05).