Dietary Supplementation with Hydrolyzable Tannin Improves Nonspecific Immune Responses, Intestinal Morphology, and Disease Resistance against Vibrio alginolyticus in Whiteleg Shrimp

Figure 4

Intestinal tissue of whiteleg shrimp fed with different concentrations of hydrolyzable tannin over 28 days. Transverse sections of intestinal tissue of the whiteleg shrimp with (a) 0 g/kg, (b) 1 g/kg, (c) 2 g/kg, (d) 4 g/kg, and (e) 8 g/kg hydrolyzable tannins. (A) Intestinal wall thickness and (B) intestinal villi height. Scale bar = 40 µm. Original magnification: ×200. The effect of hydrolyzable tannins in the diet (C, T1, T2, T4, and T8) on (f) wall thickness and (g) intestinal villi length of whiteleg shrimp. Data are expressed as mean ± standard error of the mean (n = 5). Significant differences () between treatments are indicated by the different letters above the bars.

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