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The dietary treatments consisted of low and high SBM diets. On d 20 and 42, jejunal mucosa and tissue samples were collected. Treatments were arranged in 2\u2009\u00d7\u20092 factors with dietary SBM levels (low and high SBM diets) and days post-weaning (20 d and 42 d post-weaning).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Pigs fed high SBM diets had greater (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009&lt;\u20090.05) relative abundance (RA) of jejunal\n                      <jats:italic>Prevotella<\/jats:italic>\n                      , tended to have greater (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009=\u20090.091) jejunal IgA, had greater (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009&lt;\u20090.05) crypt depth, and tended to have lower (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009=\u20090.064) villus height to crypt depth ratio (VH:CD) than pigs fed low SBM diets. Pigs at 20 d post-weaning had greater (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009&lt;\u20090.05) RA of jejunal\n                      <jats:italic>Lactobacillus<\/jats:italic>\n                      and had greater (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009&lt;\u20090.05) jejunal IL-8 and protein carbonyl than pigs at 42 d post-weaning. Pigs at 20 d post-weaning tended to have greater (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009=\u20090.090) jejunal IgG, tended to have lower (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009=\u20090.059) jejunal IgA, and had greater (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009&lt;\u20090.05) proportion (%) of Ki-67\n                      <jats:sup>+<\/jats:sup>\n                      cells in the jejunal crypt than pigs at 42 d post-weaning.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>\n                      Pigs fed high SBM diets showed greater RA of\n                      <jats:italic>Staphylococcus<\/jats:italic>\n                      , a greater immune response, and a decreased VH:CD in the jejunum than pigs fed low SBM diets. Pigs at 20 d post-weaning were more susceptible to jejunal inflammation and intestinal damage than pigs at 42 d post-weaning, but the negative impacts of high SBM diets on jejunal inflammation and intestinal damage were consistent compared to low SBM diets at 20 d and 42 d post-weaning.\u00a0\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s40104-025-01271-0","type":"journal-article","created":{"date-parts":[[2025,10,24]],"date-time":"2025-10-24T00:02:31Z","timestamp":1761264151000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Impacts of different dietary soybean meal levels on jejunal immunity of nursery pigs at different days post-weaning"],"prefix":"10.1186","volume":"16","author":[{"given":"Hyunjun","family":"Choi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zixiao","family":"Deng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4591-1943","authenticated-orcid":false,"given":"Sung Woo","family":"Kim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,10,24]]},"reference":[{"key":"1271_CR1","doi-asserted-by":"publisher","first-page":"569","DOI":"10.3390\/antiox13050569","volume":"13","author":"Z Deng","year":"2024","unstructured":"Deng Z, Kim SW. 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