{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,23]],"date-time":"2026-08-23T15:47:45Z","timestamp":1787500065094,"version":"build-2736575974"},"reference-count":62,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2022,12,9]],"date-time":"2022-12-09T00:00:00Z","timestamp":1670544000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003009","name":"Science, and Technology Development Fund (STDF)","doi-asserted-by":"publisher","award":["30339"],"award-info":[{"award-number":["30339"]}],"id":[{"id":"10.13039\/501100003009","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>this study aimed to investigate the growth mechanism in a local breed of chickens by comparing the highest weight (HW) and the lowest weight in their microbiota, histological characteristics, and gene expression. Golden Montazah chickens, an Egyptian breed, were reared until they were 49 days old. All of the birds were fed ad libitum by a starter diet from day 1 until day 21, followed by a grower diet from day 21 to the end of the study. At 49 days old, the forty-eight birds with the heaviest body weight (HW) and the lightest body weight (LW) were chosen. Blood biochemical and histological morphometric parameters, electron microscopy, and intestinal nutrient transporter gene expression were studied in the sampled jejunum. The microbial composition and functions of the content and mucosa in HW and LW chickens were studied using 16S rRNA gene sequencing. The histological morphometric parameters were all more significantly (p &lt; 0.05) increased in the HW chickens than in the LW chickens. Total protein, albumin, and triglycerides in serum were significantly higher (p &lt; 0.05) in the HW chickens than in the LW chickens. The microbiome profile in the gut showed that Microbacterium and Sphingomonas were positively correlated with the body weights. In the local breed, there were significant differences in the intestinal microstructure which could enhance the growth mechanism and body weight. Our findings showed that some microbial components were significantly associated with body weight and their interactions with the host could be inferred to explain why these interactions might alter the host\u2019s metabolic responses. Further investigation into combining bioinformatics with lab experiments in chickens will help us to understand how gut bacteria can change the host\u2019s metabolism by special metabolic features in the gastrointestinal system.<\/jats:p>","DOI":"10.3390\/ani12243474","type":"journal-article","created":{"date-parts":[[2022,12,9]],"date-time":"2022-12-09T02:50:51Z","timestamp":1670554251000},"page":"3474","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Gut Microbiota, Intestinal Morphometric Characteristics, and Gene Expression in Relation to the Growth Performance of Chickens"],"prefix":"10.3390","volume":"12","author":[{"given":"El-Sayed M.","family":"Abdel-Kafy","sequence":"first","affiliation":[{"name":"Animal Production Research Institute (APRI), Agricultural Research Center (ARC), Dokki, Giza 12651, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8881-4900","authenticated-orcid":false,"given":"Sabbah F.","family":"Youssef","sequence":"additional","affiliation":[{"name":"Animal Production Research Institute (APRI), Agricultural Research Center (ARC), Dokki, Giza 12651, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6815-6306","authenticated-orcid":false,"given":"Mahmoud","family":"Magdy","sequence":"additional","affiliation":[{"name":"Genetics Department, Faculty of Agriculture, Ain Shams University, Cairo 11241, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shereen S.","family":"Ghoneim","sequence":"additional","affiliation":[{"name":"Animal Production Research Institute (APRI), Agricultural Research Center (ARC), Dokki, Giza 12651, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1594-5341","authenticated-orcid":false,"given":"Hesham A.","family":"Abdelatif","sequence":"additional","affiliation":[{"name":"Animal Production Research Institute (APRI), Agricultural Research Center (ARC), Dokki, Giza 12651, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2992-8745","authenticated-orcid":false,"given":"Randa A.","family":"Deif-Allah","sequence":"additional","affiliation":[{"name":"Animal Production Research Institute (APRI), Agricultural Research Center (ARC), Dokki, Giza 12651, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yasmein Z.","family":"Abdel-Ghafar","sequence":"additional","affiliation":[{"name":"Animal Production Research Institute (APRI), Agricultural Research Center (ARC), Dokki, Giza 12651, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hoda M. A.","family":"Shabaan","sequence":"additional","affiliation":[{"name":"Animal Production Research Institute (APRI), Agricultural Research Center (ARC), Dokki, Giza 12651, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1699-8760","authenticated-orcid":false,"given":"Huazhen","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Basic Veterinary Medicine, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7175-1408","authenticated-orcid":false,"given":"Abdelmotaleb","family":"Elokil","sequence":"additional","affiliation":[{"name":"Department of Animal Production, Faculty of Agriculture, Benha University, Moshtohor 13736, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Barrow, P., Nair, V., Baigent, S., Atterbury, R., and Clark, M. 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