Isolation and molecular characterization of subgroup J avian leukosis virus in native chicken breeds of China during 2022-2025.

ABSTRACT: Avian leukosis virus subgroup J (ALV-J) primarily infects poultry, especially chickens, where it induces immunosuppression and tumorigenesis. ALV-J has caused substantial economic losses worldwide and is prevalent among indigenous chicken breeds in China. In this study, we analyzed the genomic characteristics of ALV-J strains isolated from diseased liver tissue or anticoagulant blood samples collected from Lushi chickens, Central Plains cockfighting, and Hetian chickens between 2022 and 2025. The results showed that the nine isolates clustered within Clades 1.2 and 1.3, indicating that ALV-J is concurrently prevalent in multiple native chicken lineages. Compared with the ALV-J prototype strain HPRS-103, multiple specific functionally significant point mutations or deletion mutations occurr

SUBMITTER: Liu Q 

PROVIDER: S-EPMC12536225 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature