Mice were treated with α-IL-5 clone TRFK5 or isotype control antibody as described in Experimental Procedures. A, Total eosinophils at day 6 were determined as described in Fig.2. B, colon length normalized to initial body weight and C, disease activity (DAI) determined over the timecourse of DSS exposure (left) and in an expanded representation for day 6 after DSS exposure (right). Dotted line represents colon length per initial body weight from water control animals (B) or maximum DAI score (C). Data represents mean ± SEM; n=10, **p<0.01 compared to WT isotype, WT α-IL-5 and G2A−/− α-IL-5; *p<0.05 compared to G2A−/− α-IL-5 or WT isotype; #p<0.05 compared to WT isotype, G2A−/− isotype and G2A−/− α-IL-5; †p<0.01 compared to WT isotype or G2A−/− α-IL-5.