Figure 1From: The Salmonella Pathogenicity Island (SPI) 1 contributes more than SPI2 to the colonization of the chicken by Salmonella enterica serovar TyphimuriumGenetic organization of SPI1 (A) and SPI2 (B). The genes encoding structural proteins are in grey, and the genes that code for transcriptional regulators are in black. The deletions are represented by the black line above the graphs.Back to article page