SPI2 is essential to the colonization of mouse spleen by Typhimurium. Competitive indexes are from mixed infections in mice with the wild type and the Δspi2 (deletion of SPI2 structural genes), or the Δspi1 (deletion of SPI1) and the Δspi2 strains. Data from day 3 and day 5 post-infection correspond to intra-peritoneal and oral infections respectively. Each point represents an organ from an individual mouse.
Dieye et al. BMC Microbiology 2009 9:3 doi:10.1186/1471-2180-9-3