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. 2020 Nov 21;10(11):2175. doi: 10.3390/ani10112175

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Histopathology analysis of proximal intestine showing the height of villi (A) and enterocytes (B), the percentage of supranuclear vacuolization (C), the percentage of brush border integrity (D) and the number of villi fusions per section (E) in rainbow trouts fed experimental diets containing increasing levels of Narbonne vetch meal: 0% (Control), 10% (A10) and 30% (A30) of inclusion. Please, note examples (arrows) of brush border integrity fully preserved (F) or partially degraded (G) and proximal intestine sections without (H) or showing villi fusions (asterisks; (I)). Different letters denote significant differences among experimental groups at each sampling day (ANOVA, p < 0.05; n = 3).