FIG 2 .

Effect of saf sti stc agf quadruple deletion on the colonization of mouse liver (A) and spleen (B) by S. Typhimurium. The competitive indexes were determined from mixed intraperitoneal infection with S. Typhimurium wild-type strain (χ3761) and one of two fimbrial quadruple mutants (χ11484 and χ11599). Each symbol represents the value for an organ from an individual mouse at the indicated day following the infection. The geometric means of the competitive indexes (mean CI) and the P values from a Student’s t test are given below the graphs.