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Published in: Virology Journal 1/2023

Open Access 01-12-2023 | Respiratory Syncytial Virus Infection | Research

Molecular epidemiology and characteristics of respiratory syncytial virus among hospitalized children in Guangzhou, China

Authors: Sajid Umar, Rongyuan Yang, Xinye Wang, Yuntao Liu, Peifeng Ke, Sheng Qin

Published in: Virology Journal | Issue 1/2023

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Abstract

Background

Human respiratory syncytial virus (RSV) is a leading cause of acute lower respiratory tract infection and hospitalization, especially in children. Highly mutagenic nature and antigenic diversity enable the RSV to successfully survive in human population. We conducted a molecular epidemiological study during 2017–2021 to investigate the prevalence and genetic characteristics of RSV.

Methods

A total of 6499 nasopharyngeal (NP) swabs were collected from hospitalized children at Department of Pediatrics, Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou, Guangdong, China. All NP swab specimens were preliminary screened for common respiratory viruses and then tested for RSV using specific PCR assays. Partial G genes of RSV were amplified for phylogenetic analysis and genetic characterization.

Results

The overall detection rate for common respiratory viruses was 16.12% (1048/6499). Among those, 405 specimens (6.20%, 405/6499) were found positive for RSV. The monthly distribution of RSV and other respiratory viruses was variable, and the highest incidence was recorded in Autumn and Winter. Based on the sequencing of hypervariable region of G gene, 93 RSV sequences were sub-grouped into RSV-A (56, 60.2%) and RSV-B (37, 39.8%). There was no coinfection of RSV-A and RSV-B in the tested samples. Phylogenetic analysis revealed that RSV-A and RSV-B strains belonged to ON1 and BA9 genotypes respectively, indicating predominance of these genotypes in Guangzhou. Several substitutions were observed which may likely change the antigenicity and pathogenicity of RSV. Multiple glycosylation sites were noticed, demonstrating high selection pressure on these genotypes.

Conclusion

This study illustrated useful information about epidemiology, genetic characteristics, and circulating genotypes of RSV in Guangzhou China. Regular monitoring of the circulating strains of RSV in different parts of China could assist in the development of more effective vaccines and preventive measures.
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Metadata
Title
Molecular epidemiology and characteristics of respiratory syncytial virus among hospitalized children in Guangzhou, China
Authors
Sajid Umar
Rongyuan Yang
Xinye Wang
Yuntao Liu
Peifeng Ke
Sheng Qin
Publication date
01-12-2023
Publisher
BioMed Central
Published in
Virology Journal / Issue 1/2023
Electronic ISSN: 1743-422X
DOI
https://doi.org/10.1186/s12985-023-02227-4

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