ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2018, Vol. 49 ›› Issue (8): 1781-1788.doi: 10.11843/j.issn.0366-6964.2018.08.024

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Distribution and Molecular Characterization of 4 New Class Ⅰ Newcastle Disease Viruses Isolated from China

WEI Run-yu1,2,4, LUO Yao-yao2,3, LÜ Yan2, WANG Jing-jing2, ZHENG Dong-xia2, ZHAO Yun-ling2, LIU Wen-bo1,4*, LIU Hua-lei2*, WANG Zhi-liang2*   

  1. 1. College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China;
    2. China Animal Health and Epidemiology Center, Qingdao 266032, China;
    3. Qingdao Agricultural University, Qingdao 266109, China;
    4. A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, Yangzhou 225009, China
  • Received:2017-11-30 Online:2018-08-23 Published:2018-08-23

Abstract:

In order to understand the distribution and molecular characteristics of new emerged class Ⅰ Newcastle disease virus in China. We carried out the F gene sequence analysis and phylogenetic analysis of 4 viruses isolated in 2016. Results were as follows:The length of complete F gene of 4 NDV isolates were 1 662 nt, encoding 553 amino acids, and the amino acid identity among all isolates was 97.9%-100%. The amino acid motif at F protein cleavage site of the 4 isolates was 112ERQERL117, which was consistent with that of lentogenic Newcastle disease virus. The phylogenetic analysis of F gene (47-420 nt) showed that all 4 isolates were newly emerging NDVs in China. Phylogenetic tree constructed by the complete F genes showed 4 Class Ⅰ viruses belonged to sub-genotype 1c, which showed a high level of similarity with isolates obtained from North America, and had the identity of 95.5%-97% with the sub-genotype 1c virus (Duck/Guangxi/1261/2015) isolated in China. Our results indicated that the new emerged class Ⅰ NDVs had the ability to circulate and spread in China.

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