FIG 5 .

EAEC infection enhances MUC1 expression in human intestinal xenografts in an AAF-dependent manner. Human fetal small intestinal xenografts were previously infected for 24 h with wild-type 042, an 042 isogenic AAF/II mutant, E. coli strain HB101, HB101 carrying an AAF/II-encoding plasmid, or sterile HBSS⁺ (13). Here, tissue sections (shown in blue) were stained with DAPI, and MUC1 (shown in red) was stained using human MUC1 (VU4H5) MAb. Photographs show representative tissues for each treatment.