{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T07:51:28Z","timestamp":1791359488839,"version":"4.3.1"},"reference-count":79,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2025,10,22]],"date-time":"2025-10-22T00:00:00Z","timestamp":1761091200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"University of Life Sciences \u201cRegele Mihai I\u201d from Timisoara"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Veterinary Sciences"],"abstract":"<jats:p>Infections caused by avian orthoreovirus represent an emerging problem with a major impact on the global poultry industry, especially in the intensive rearing of broilers. This article addresses, in a complex manner, the etiology of some clinical syndromes of interest in poultry farming: malabsorption syndrome and arthritis\/tenosynovitis syndrome. Data are presented, starting from the development and physiology of the digestive tract in broiler chickens in the post-hatch period, epidemiological data, clinical signs, morphopathological changes in the intestine, and diagnostic methods in orthoreovirus infections. The development of the digestive tract is influenced by factors such as diet, digestive enzymes, intestinal pH, and intestinal microbiome\/virome. Avian orthoreoviruses, belonging to the Reoviridae family, are double-stranded RNA viruses with multiple tropism. Phylogenetic analysis revealed the existence of at least six major genotypes, with a heterogeneous geographical distribution and genetic diversity that complicates control measures with vaccination. Characterization of the intestinal virome of broilers highlights many other enteric viruses, in addition to reoviruses, with pathogenic potential in triggering malabsorption syndrome. Thus, we can state that the etiology of malabsorption syndrome is not unitary, with the association of several viruses with intestinal tropism aggravating the clinical signs. The article describes viral identification methods, including classical techniques and advanced next-generation sequencing (NGS) approaches, used to characterize the intestinal virome and emerging pathogens. Finally, for prophylaxis, autogenous vaccines adapted to local circulating strains are recommended. Frequent genetic recombinations and high antigenic variation require continuous monitoring and constant adaptation of immunization schedules to control the disease.<\/jats:p>","DOI":"10.3390\/vetsci12111021","type":"journal-article","created":{"date-parts":[[2025,10,23]],"date-time":"2025-10-23T01:14:02Z","timestamp":1761182042000},"page":"1021","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Reovirus Infections in Broiler Chickens: A Narrative Review"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-3539-8454","authenticated-orcid":false,"given":"George-Andrei","family":"C\u0103lug\u0103ri\u021ba","sequence":"first","affiliation":[{"name":"Department of Anatomic Pathology and Forensic Medicine, Faculty of Veterinary Medicine, University of Life Science \u201cKing Mihai I\u201d, Calea Aradului Street, Number 119, 300645 Timisoara, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1153-6498","authenticated-orcid":false,"given":"Iasmina","family":"Luca","sequence":"additional","affiliation":[{"name":"Department of Anatomic Pathology and Forensic Medicine, Faculty of Veterinary Medicine, University of Life Science \u201cKing Mihai I\u201d, Calea Aradului Street, Number 119, 300645 Timisoara, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8420-0090","authenticated-orcid":false,"given":"Radu-Valentin","family":"Gros","sequence":"additional","affiliation":[{"name":"Department of Microbiology, Faculty of Veterinary Medicine, University of Life Science \u201cKing Mihai I\u201d, Calea Aradului Street, Number 119, 300645 Timisoara, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-9422-5375","authenticated-orcid":false,"given":"Tudor-Mihai","family":"C\u0103s\u0103lean","sequence":"additional","affiliation":[{"name":"Department of Surgery, Faculty of Veterinary Medicine, University of Life Science \u201cKing Mihai I\u201d, Calea Aradului Street, Number 119, 300645 Timisoara, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexandru","family":"Gavril\u0103","sequence":"additional","affiliation":[{"name":"Department of Anatomic Pathology and Forensic Medicine, Faculty of Veterinary Medicine, University of Life Science \u201cKing Mihai I\u201d, Calea Aradului Street, Number 119, 300645 Timisoara, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adrian","family":"Stancu","sequence":"additional","affiliation":[{"name":"Department of Anatomic Pathology and Forensic Medicine, Faculty of Veterinary Medicine, University of Life Science \u201cKing Mihai I\u201d, Calea Aradului Street, Number 119, 300645 Timisoara, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,10,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1429","DOI":"10.1111\/jpn.13859","article-title":"Physiology of lipid digestion and absorption in poultry: An updated review on the supplementation of exogenous emulsifiers in broiler diets","volume":"107","author":"Oketch","year":"2023","journal-title":"J. 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