IL10 and cancer: Arthur et al. reported that intestinal colonization of Il-10−/− mice by the human commensal Enterococcus faecalis strain OG1RF or the colibactin-producing AIEC strain NC101 caused comparable intestinal inflammation, but only NC101 was able to induce cancer in AOM-treated Il-10−/− mice (Arthur et al., 2012) (Table 1).