Fig. 1

Histological sections of Nile tilapia intestinal villi in group 1 (A) (control) and treated groups G2 (B), G3 (C), G4 (D), G5 (E) and G6 (F) showing gradual increase in the length of intestinal villi during study with noticeable branching of intestinal villi in last stage. H&E stain, bar indicates magnification