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Identification and molecular characterization of a novel flavivirus isolated from Pekin ducklings in China

文献类型： 外文期刊

作者： Yun, Tao 1 ; Ye, Weicheng 1 ; Ni, Zheng 1 ; Zhang, Dabing 2 ; Zhang, Cun 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Anim Husb & Vet Sci, Hangzhou 310021, Zhejiang, Peoples R China

2.China Agr Univ, Coll Vet Med, Minist Agr, Key Lab Zoonosis, Beijing 100193, Peoples R China

关键词： Duck Tembusu virus (DTMUV);Pekin duckling;Isolation and identification;Genome

期刊名称：VETERINARY MICROBIOLOGY （ 影响因子：3.293； 五年影响因子：3.599 ）

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收录情况： SCI

摘要： A flavivirus-associated disease of egg-laying ducks was observed in eastern China in 2010, and a novel mosquito-borne flavivirus, Tembusu virus (TMUV), was isolated (Cao et al., 2011). Following up on the earlier study, a virus similar to TMUV was isolated recently from ducklings and characterized. We report that (1) the recently isolated virus, TMUV ZJ-6, replicated in vertebrate cells (DF-1, BHK-21) as well as in mosquito cells (C6/36) and caused cytopathic effect (CPE) in the cell lines tested; (2) extracellular viral particles examined by electron microscopy were approximately 45 nm in diameter and enveloped; (3) the full-length genome of the virus was determined, showing that the TMUV ZJ-6 is more closely related to the Ntaya group of viruses than other members of the Flaviviridae based on the data of phylogenetic analyses. Most importantly, the disease of ducklings was reproducible after administration of plaque-purified virus by intracerebral (i.c.), subcutaneous (s.c.) or intranasal (i.n.) inoculation. This is the first report that TMUV infects not only egg-laying ducks but also 3-21 days-old ducklings. The findings extend our understanding of how the virus spreads and causes disease. (C) 2012 Elsevier B.V. All rights reserved.

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