Molecular characteristics of the re-emerged avian leukosis virus in China, 2018-2019.

Abstract:

:Since early 2018, avian leukosis virus (ALV) has re-emerged throughout six provinces in Northeast and East of China and caused huge economic losses. In different farms, there are significant differences in clinical symptoms, including morbidity, mortality and location of tumours, on affected animals, which implies that the present strains may have different origins and molecular characteristics. In this study, a systematic epidemiological investigation was conducted in 21 farms in six provinces. Results showed that the virus strains present in this outbreak are highly consistent but carry different mutations. All the strains shared 97.0%-99.0% identity with each other and were highly similar to the GD14J2 strain isolated previously, while different insertion fragments can be found in the env gene of different strains, suggesting that the strains of ALV in this outbreak may have the same ancestors but have gone through different evolutionary trajectories. This study demonstrated that these viruses may point to multiple sources of infection, and all should be identified and taken seriously in the formulation of control plans.

journal_name

Transbound Emerg Dis

authors

Zhang Y,Su Q,Zhang Z,Cui Z,Chang S,Zhao P

doi

10.1111/tbed.13440

subject

Has Abstract

pub_date

2020-05-01 00:00:00

pages

1141-1151

issue

3

eissn

1865-1674

issn

1865-1682

journal_volume

67

pub_type

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