Fig. 5From: Plasmodium yoelii infection inhibits murine leukaemia WEHI-3 cell proliferation in vivo by promoting immune responsesEffect of P. yoelii infection on NK cell activity. Splenocytes were isolated from all mice in all groups. NK cell cytotoxicity was determined at the indicated effector-to-target ratios using a PI exclusion assay and flow cytometry. The results are expressed as the mean ± SD of 10 samples per group; *** P < 0.001Back to article page