To explore mechanisms by which IL-4-conditioned mast cells enhance survival from septic peritonitis, peritoneal inflammatory cell profiles in Wsh+WT and Wsh+WT+IL-4 mice were compared at baseline and 4 h after i.p. injection of Klebsiella. Uninfected Wsh+WT and Wsh+WT+IL-4 mice did not differ in total differential cell counts, indicating that IL-4 conditioning of BMCMC does not influence the baseline profile of peritoneal inflammatory cells (Fig. 6C). This evidence concerns the gene IL4 and septic peritonitis.