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Chicken is one of the economically important poultry species. Avian leucosis virus subgroup J (ALV-J) has emerged as a serious cause of mortality and suboptimal performance of domestic chickens. Changes in virome may contribute to pathogenesis. Thus, it is important to investigate the effects of ALV-J infection on the composition of the virome in chicken. In the study metagenomic sequencing was used to characterize the virome of feces collected from the AVL-J infected chickens and the controls. Our results indicated that the chicken gut virome contained a diverse range of viruses that can be found in mammal, reptile, fish, and frogs. Furthermore, at the order, family and genus levels, AVL-J infection significantly altered the chicken gut virome composition. The predominant order was Herpesvirales, accounting for more than 96% of the chicken gut virome. Furthermore, the relative abundance of Caudovirales in the controls was higher than that in the AVL-J-infected chickens. At the family level, the relative abundance of Herpesviridae, Myoviridae, Alloherpesviridae, and Genomoviridae was significantly altered in the AVL-J-infected chickens compared with that in the controls. Additionally, the relative abundance of 15 genera showed a significant difference between the AVL-J-infected chickens and controls. These results will increase our understanding of the viral diversity and changes in the virome of chicken gut, with implications in chicken health.

Avian leukosis virus subgroup J infection alters viral composition in the chicken gut