Prevalence of Norovirus GⅡ in adult acute gastroenteritis outpatients in Shanghai from 2015 to 2016
10.3760/cma.j.cn112866-20191119-00182
- VernacularTitle:2015—2016年上海地区成人门诊腹泻病例中诺如病毒GⅡ型流行特征
- Author:
Haili CHEN
1
;
Chunyi YANG
;
Wanju ZHANG
;
Yi LIU
;
Di TIAN
;
Wei WANG
;
Zhigang YI
;
Zhaoqin ZHU
Author Information
1. 上海市公共卫生临床中心 201508
- Keywords:
Norovirus;
GⅡ genotype;
Adult gastroenteritis
- From:
Chinese Journal of Experimental and Clinical Virology
2020;34(2):145-150
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To understand the genotyping and molecular epidemiological characteristics of Norovirus (NoV) GⅡ in adult acute gastroenteritis outpatients in Shanghai from 2015 to 2016.Methods:A total of 912 stool specimens from adult patients with acute diarrhea from March 2015 to December 2016 (431 in 2015 and 481 in 2016) were collected. The Norovirus GⅡ type was detected by one-step quantitative reverse transcription PCR assay and the RdRp region of open reading frame (ORF) 1 and 5′end of ORF2 were amplified. The region was sequenced and classified.Results:From March 2015 to December 2016, NoV GⅡ were detected in 17.76% (162/912) of the samples, 15.08% (65 /431) in 2015 and 20.17% (97/481) in 2016. Based on sequence analysis of the RdRp and capsid sequences, 145 identified NoV strains were divided into 10 genotypes: GⅡ.Pe_GⅡ.4 Sydney 2012 (60), GⅡ.P17_GⅡ.17 (45), GⅡ.P16_GⅡ.13 (10), GⅡ.P12_GⅡ.3 (10), GⅡ.P7_GⅡ.6 (9), GⅡ.P21_GⅡ.21 (5), GⅡ.P16_GⅡ.4 Sydney 2012 (2), GⅡ.Pe_GⅡ.17 (2), GⅡ.P2_GⅡ.2 (1), and GⅡ.P7_GⅡ.14 (1).Conclusions:The main epidemic NoV GⅡ genotype in Shanghai was GⅡ.P17_GⅡ.17 in the spring of 2015. GⅡ.Pe_GⅡ.4 Sydney 2012 and GⅡ.P17_GⅡ.17 were identified as predominant genotypes during the winter of 2015 and spring of 2016. The most common genotype was GⅡ.Pe_GⅡ.4 Sydney 2012 in autumn of 2016. Continuous NoV outbreak surveillance is important for identifying changing trends in genotype distribution and emerging new strains.
