|
1
|
Chen LN, Wang SJ, Wang SM, Fu XL, Zheng WJ, Hao ZY, Zhou HS, Zhang XJ, Zhao YL, Qiu C, von Seidlein L, Qiu TY, Wang XY. Molecular epidemiology analysis of symptomatic and asymptomatic norovirus infections in Chinese infants. Virol J 2023; 20:60. [PMID: 37016444 PMCID: PMC10074819 DOI: 10.1186/s12985-023-02024-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 03/28/2023] [Indexed: 04/06/2023] Open
Abstract
BACKGROUND Norovirus is a leading cause of acute gastroenteritis among children. Previous studies based on symptomatic infections indicated that mutations, rather than recombination drove the evolution of the norovirus ORF2. These characteristics were found in hospital-based symptomatic infections, whereas, asymptomatic infections are frequent and contribute significantly to transmission. METHODS We conducted the first norovirus molecular epidemiology analysis covering both symptomatic and asymptomatic infections derived from a birth cohort study in the northern China. RESULTS During the study, 14 symptomatic and 20 asymptomatic norovirus infections were detected in 32 infants. Out of the 14 strains that caused symptomatic infections, 12 strains were identified as GII.3[P12], and others were GII.4[P31]. Conversely, 17 asymptomatic infections were caused by GII.4[P31], two by GII.2[P16], and one by GII.4[P16]. Regardless of symptomatic and asymptomatic infections, the mutations were detected frequently in the ORF2 region, and almost all recombination were identified in the RdRp-ORF2 region. The majority of the mutations were located around the predefined epitope regions of P2 subdomain indicating a potential for immune evasion. CONCLUSION The role of symptomatic as well as asymptomatic infections in the evolution of norovirus needs to be evaluated continuously.
Collapse
Affiliation(s)
- Li-Na Chen
- Key Laboratory of Medical Molecular Virology of MoE & MoH and Institutes of Biomedical Sciences, Fudan University, 138 Yi Xue Yuan Rd., Shanghai, 200032, People's Republic of China
| | - Si-Jie Wang
- Key Laboratory of Medical Molecular Virology of MoE & MoH and Institutes of Biomedical Sciences, Fudan University, 138 Yi Xue Yuan Rd., Shanghai, 200032, People's Republic of China
| | - Song-Mei Wang
- Laboratory of Molecular Biology, Training Center of Medical Experiments, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Xiao-Li Fu
- Key Laboratory of Medical Molecular Virology of MoE & MoH and Institutes of Biomedical Sciences, Fudan University, 138 Yi Xue Yuan Rd., Shanghai, 200032, People's Republic of China
| | - Wen-Jing Zheng
- Key Laboratory of Medical Molecular Virology of MoE & MoH and Institutes of Biomedical Sciences, Fudan University, 138 Yi Xue Yuan Rd., Shanghai, 200032, People's Republic of China
| | - Zhi-Yong Hao
- Zhengding County Center for Disease Control and Prevention, Zhengding, 050800, People's Republic of China
| | - Hai-Song Zhou
- Zhengding County Center for Disease Control and Prevention, Zhengding, 050800, People's Republic of China
| | - Xin-Jiang Zhang
- Zhengding County Center for Disease Control and Prevention, Zhengding, 050800, People's Republic of China
| | - Yu-Liang Zhao
- Hebei Province Center for Disease Control and Prevention, Shijiazhuang, 050021, People's Republic of China
| | - Chao Qiu
- Key Laboratory of Medical Molecular Virology of MoE & MoH and Institutes of Biomedical Sciences, Fudan University, 138 Yi Xue Yuan Rd., Shanghai, 200032, People's Republic of China
| | - Lorenz von Seidlein
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, 73170, Thailand
| | - Tian-Yi Qiu
- Institute of Clinical Science, ZhongShan Hospital, Fudan University, 180 Feng Ling Road, Shanghai, People's Republic of China.
| | - Xuan-Yi Wang
- Key Laboratory of Medical Molecular Virology of MoE & MoH and Institutes of Biomedical Sciences, Fudan University, 138 Yi Xue Yuan Rd., Shanghai, 200032, People's Republic of China.
- Shanghai Institute of Infectious Disease and Biosecurity, Shanghai, 200032, People's Republic of China.
- Children's Hospital, Fudan University, Shanghai, 200032, People's Republic of China.
| |
Collapse
|