ArticleMicrobiome2026
Characterization of the gut phageome and functional genes carried by phages in laying hens with fatty liver hemorrhagic syndrome.
Article in Microbiome, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundThe gut microbiota is closely associated with the development of fatty liver hemorrhagic syndrome (FLHS); however, the function of its viral component, particularly bacteriophages, remains poorly understood. This study compared clinical parameters and the cecal phageome between 30-week-old (W30) and 50-week-old (W50) laying hens to characterize gut phages in the context of this metabolic disorder.
resultsClinical analysis revealed that the W50 group exhibited typical FLHS, accompanied by elevated serum liver function and lipid markers (P < 0.05). Functional prediction of the gut microbiota suggested a reduced lipid-metabolic capacity in W50 compared to the W30 group. A total of 20,274 phage genomes were identified from the two groups. These phages were primarily classified into 67 viral families, including Salasmaviridae, Herelleviridae, Suoliviridae, Peduoviridae, Crevaviridae, and Casjensviridae. The families Druskaviridae, Felixviridae, and Stanwilliamsviridae were uniquely detected in the W50 group. The phage community structure differed significantly between groups, with both phage diversity and richness markedly lower in W50 (P < 0.05). LEfSe analysis revealed that phage taxa such as Stegnyidae, Herpelidae, and Chasovidae were significantly enriched in the W50 group, whereas Crewdviridae, Salasmaviridae, and Castroviridae were predominantly enriched in the W30 group. Functional annotation showed that these phages encode numerous metabolism-related genes and carry antimicrobial resistance genes (ARGs) as well as virulence factor genes. Notably, the diversity of ARGs carried by W50 phages was significantly higher (P < 0.05), and ARG-rank analysis indicated a greater potential risk to human health.
conclusionsThis study provides the first characterization of the gut phageome associated with FLHS in laying hens and confirms that gut phages constitute an important reservoir of ARGs. These findings offer a new perspective for understanding the pathogenesis of this disease and its associated public health risks. Video Abstract.
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