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Chicken-origin Cluster 3.2 Tembusu virus exhibits higher infectivity than duck-origin Cluster 2 Tembusu virus in chicks

文献类型： 外文期刊

作者： Huang, Yunzhen 1 ; Hu, Ziqiang 3 ; Dong, Jiawen 1 ; Li, Linlin 1 ; Zhang, Junqin 1 ; Kuang, Ruihuan 1 ; Gao, Shimin 3 ; Sun, Minhua 1 ; Liao, Ming 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Anim Hlth, Guangzhou, Peoples R China

2.Key Lab Livestock Dis Prevent & Treatment Guangdon, Guangzhou, Peoples R China

3.Shanxi Agr Univ, Coll Vet Med, Taigu, Peoples R China

4.Guangdong Lab Lingnan Modern Agr, Guangzhou, Peoples R China

5.Minist Agr & Rural Affairs, Key Lab Prevent & Control Avian Influenza & Other, Guangzhou, Peoples R China

关键词： tembusu virus; egg-drop syndrome; infectivity; pathogenicity; chicks

期刊名称：FRONTIERS IN VETERINARY SCIENCE （ 影响因子：3.2； 五年影响因子：3.5 ）

ISSN：

年卷期： 2023 年 10 卷

页码：

收录情况： SCI

摘要： In 2020, a chicken-origin Cluster 3 Tembusu virus (TMUV) caused outbreaks of a disease characterized by egg-drop syndrome in laying hens in China. In the present study, a TMUV strain, TMUV-GX, was isolated from tissue samples of laying hens with egg drop syndrome in south China. Phylogenetic analysis grouped TMUV-GX into TMUV Cluster 3.2, which was distinct from the prevalent TMUV Cluster 2 in duck flocks. To study the infectivity and pathogenicity of TMUV-GX in chickens and ducks, 7 day-old specific pathogen-free (SPF) chicks and SPF ducklings were infected with the same dose of the TMUV-GX. As a comparison, the duck-origin Cluster 2 strain, TMUV-JM, infection groups were set up in chicks and ducklings. Compared with the low infectivity and pathogenicity of TMUV-JM in chicks, the chicken-origin TMUV-GX displayed high replication competence in multiple tissues and caused tissues histopathological damage. In addition, the replication competence of TMUV-GX in ducklings was comparable to that of TMUV-JM. Our study revealed chicken-origin Cluster 3.2 TMUV exhibits high infectivity in chicks and ducklings, and suggested that chicken-origin Cluster 3.2 TMUV possesses a biological basis for widespread infection of chickens and ducks.

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