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Lysis of cells infected with C. trachomatis by CTL in a 51Cr release assay. The CTL lines were stimulated from spleen cells of IFN-γ+/+, IFN-γ+/−, and IFN-γ−/− mice following intraperitoneal infection with C. trachomatis. Target cells were C. trachomatis serovar L2-infected (•) or uninfected (○) BALB/3T3 cells.
