Photomicrograph of S. mansoni infected colon: (A) 8 weeks PI showing positive immunoreaction for NF-κB in the nuclei of enterocytes (wavy arrow), epithelial crypts (arrow head) and cells of lamina propria (arrow)(NF-κB immunostaining 200×), (B) 6 weeks PI showing positive immunoreaction for NF-κB in the surface epithelium (arrow head), cells of the crypts (arrow), and lymphoid follicles (star) (NF-κB immunostaining 400×), (C) 8 weeks PI showing positive immunoreaction for NF-κB in crypt epithelial cells (arrow head) and cells of the granuloma (arrow) (NF-κB immunostaining 400×), (D) 16 weeks PI showing decreased immunoreaction for NF-κB in the cells of the crypts and of the lamina propria (NF-κB immunostaining 400×), and (E) negative control showed no immune reaction (NF-κB immunostaining 400×).