NDLI: Analysis of influenza B virus lineages and the HA1 domain of its hemagglutinin gene in Guangzhou, southern China, during 2016

Content Provider	Springer Nature : BioMed Central
Author	Ye, Feng Chen, Xiao-juan Guan, Wen-da Pan, Si-hua Yang, Zi-feng Chen, Rong-chang
Abstract	Background Few studies have analyzed influenza B virus lineages based on hemagglutinin A (HA) gene sequences in southern China. The present study analyzed the HA gene and the lineages of influenza B virus isolates from Guangzhou during 2016, and compared our results with the WHO-recommended vaccine strain. Methods Ninety patients with influenza B were recruited from the First Hospital of Guangzhou Medical University. Throat swab specimens of 72 patients had high viral loads. Among these 72 isolates, the HA1 domain of the HA gene in 43 randomly selected isolates was sequenced using reverse transcription-polymerase chain reaction (RT-PCR), and analyzed using MEGA 5.05. Results Eight of the 90 patients (8.9%) also had influenza A virus infections. Analysis of the 43 influenza B virus isolates indicated that 34 (79.1%) were from the Victoria lineage and 9 (20.9%) were from the Yamagata lineage. A comparison isolates in our Victoria lineage with the B/Brisbane/60/2008 strain indicated 12 mutation sites in the HA1 domain, 4 of which (I132V, N144D, C196S, and E198D) were in antigenic epitopes. A comparison of isolates in our Yamagata lineage with the B/Phuket/3073/2013 stain indicated 5 mutation sites in the HA1 domain, none of which was in an antigenic epitope. None of the isolates had a mutation in regions of the neuraminidase gene (NA) that are known to confer resistance to NA inhibitors. Conclusion In Guangzhou during 2016, most influenza B virus isolates were from the Victoria lineage, in contrast to the vaccine strain recommended by the WHO for this period.
Related Links	https://virologyj.biomedcentral.com/counter/pdf/10.1186/s12985-018-1085-5.pdf
Ending Page	8
Page Count	8
Starting Page	1
File Format	HTM / HTML
DOI	10.1186/s12985-018-1085-5
Journal	Virology Journal
Issue Number	1
Volume Number	15
Language	English
Publisher	BioMed Central
Publisher Date	2018-11-14
Access Restriction	Open
Subject Keyword	Virology HA1 gene Antigenic epitope Influenza B virus
Content Type	Text
Resource Type	Article
Subject	Virology Infectious Diseases
Journal Impact Factor	4/2023
5-Year Journal Impact Factor	3.8/2023

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