Abstract
The genome of Salmonella Typhimurium encodes a type six secretion system (T6SS) within the Salmonella-pathogenicity island 6 (SPI-6). In Salmonella Gallinarum, the T6SS is encoded within SPI-19. Curiously, Salmonella Dublin harbors two T6SSs (SPI-6 and SPI-19). All these systems are important for the establishment of infection in mice and chickens. Recently, it was shown that SPI-6 T6SS f…