Figure 4. Histological changes in the intestine of Danio rerio after 15 days of feeding with diet supplemented with Lippia sidoides essential oil in concentrations of 0.25%, 0.50%, 0.75%, 1.00%, and 1.25%, or not supplemented negative control (NC) and supplemented with grain alcohol (GA). In (a), organ with a smaller number of villi in negative control group (arrows). In (b) show the increase in the number, length, and width of villi in 0.25% group (arrowheads). In (c) show the reduced amount of goblet cells in negative control. In (d) there is the presence of villi with a large number of goblet cells in 0.25% group (arrowhead). Hematoxylin and eosin staining. Magnification: scale bars are 10 and 20 μm.