RT Journal Article T1 Effects on Intestinal Mucosal Morphology, Productive Parameters and Microbiota Composition after Supplementation with Fermented Defatted Alperujo (FDA) in Laying Hens A1 Rebollada Merino, Agustín Miguel A1 Bárcena Asensio, Carmen A1 Ugarte Ruiz, María A1 Porras González, Néstor A1 Mayoral Alegre, Francisco Jesús A1 Tomé Sánchez, Irene A1 Rodríguez Bertos, Antonio Manuel A1 Domínguez Rodríguez, Lucas José AB The olive oil sector is currently adapting its traditional function to also become a supplier of high-value by-products that possess antioxidant, anti-inflammatory and antimicrobial properties. In this study, we evaluated the effect of the fermented defatted alperujo (FDA) on the intestinal health of laying hens. The morphology of the duodenal and cecal mucosa, the composition of the intestinal microbiota and the productivity of a batch of laying hens were evaluated after FDA supplementation. At early life stages, significant differences (p < 0.001) were observed in duodenal villi height and in crypt depth of both the duodenum and the cecum in the FDA-supplemented group, indicating improved intestinal health in this group. Microbiota composition in the hatchery group supplemented with FDA had a higher abundance of Actinobacteria, Firmicutes and Proteobacteria, and higher bacterial diversity. During the production period, significant differences (p < 0.05) were observed in the number of broken eggs from the supplemented group. We conclude that FDA supplementation improves the absorption capacity of the intestinal mucosa and modifies the intestinal microbiota to favor a greater immune response, leading to an increase in egg production. PB MDPI SN 2079-6382 YR 2019 FD 2019-11-09 LK https://hdl.handle.net/20.500.14352/7924 UL https://hdl.handle.net/20.500.14352/7924 LA eng NO Ministerio de Economía y Competitividad (MINECO) NO Comunidad de Madrid DS Docta Complutense RD 28 jul 2024