Molecular epidemiology of norovirus associated with acute gastroenteritis in Taizhou, China: A retrospective study.

Abstract:

BACKGROUND:Norovirus (NoV) is recognized as a leading global cause of viral acute gastroenteritis (AGE). To better understand the prevalence and genotypic patterns of NoV infection in Southeast China, we conducted a retrospective study of diarrheal syndrome surveillance of NoV and analyzed the epidemiological characteristics of AGE cases and phylogenetic evolution of NoV strains. METHODS:1464 AGE patients in two diarrhea surveillance sentinel hospitals were sampled during 2016 and 2017. NoV Positive samples were genotyped by ORF1/ORF2 overlapping regional gene sequencing. Sequences analyses of the NoV genotypes were confirmed by online NoV Genotyping Tool and the phylogenetic analysis was constructed by MEGA 7.0. RESULTS:139 (9.49%) of the AGE specimens were NoV positive. The GII strain was the main geno-group in NoV infected patients. At least 12 NoV genotypes and seven recombinant strains were detected. Major NoV genotypic transformations were GII.Pe/GII.4, GII.P17/GII.17 and GII.Pe/GII.17 in 2016 to GII.P16/GII.2, GII.P17/GII.17 and GII.Pe/GII.4 in 2017. Phylogenetic analysis showed that GII.P16/GII.2 recombinant strains clustered with those detected in the USA, Russia and Japan in 2016. CONCLUSION:We characterized the molecular epidemiology of NoV infection in AGE patients during 2016-2017. The main three NoV GII genotypes circulating in the population of Taizhou were GII.P17/GII.17, GII.Pe/GII.4 and GII.P16/GII.2.The GII.P16/GII.2 genotype has become the predominant strain since first quarter 2017. Monitoring of the NoV genotypic shift is important for the prevention and control of AGE.

journal_name

J Infect Public Health

authors

Shen W,Sheng Y,Weng J,Li G,Wang D,Qiu D,Lu Y,Lin H

doi

10.1016/j.jiph.2019.06.006

subject

Has Abstract

pub_date

2020-01-01 00:00:00

pages

34-39

issue

1

eissn

1876-0341

issn

1876-035X

pii

S1876-0341(19)30194-7

journal_volume

13

pub_type

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