Wu Qingrui, Wei Xiuxia, Zhang Jianjun, Xin Zhenjiang, Yang Xiaoxing, Zhang Ling, Qin Meng, Dong Xiaogen, Yan Hanqiu, Gao Zhiyong
Fengtai District Center for Disease Control and Prevention, Beijing, China.
Fangzhuang Community Health Service Center, Beijing, China.
China CDC Wkly. 2023 Feb 24;5(8):171-175. doi: 10.46234/ccdcw2023.031.
WHAT IS ALREADY KNOWN ABOUT THIS TOPIC?: Children in kindergartens and primary schools are the high-incidence groups of norovirus acute gastroenteritis. However, asymptomatic norovirus infection among them is seldom reported.
WHAT IS ADDED BY THIS REPORT?: The norovirus positive rate was 3.48% among asymptomatic children in kindergartens and primary schools in Beijing Municipality in June 2021, the most common genotype was GII.4 Sydney, and no acute gastroenteritis outbreak was reported over the study period.
WHAT ARE THE IMPLICATIONS FOR PUBLIC HEALTH PRACTICE?: The asymptomatic norovirus infection was relatively low among kindergarten children and primary school students in summer. Norovirus genotypes in asymptomatic children were similar to those circulating in the symptomatic cases. Asymptomatic norovirus infection may play a limited role in causing acute gastroenteritis outbreaks.
关于该主题已知的信息有哪些？：幼儿园和小学儿童是诺如病毒急性胃肠炎的高发群体。然而，其中无症状诺如病毒感染鲜有报道。
本报告补充了哪些内容？：2021年6月北京市幼儿园和小学无症状儿童中诺如病毒阳性率为3.48%，最常见的基因型为GII.4悉尼型，在研究期间未报告急性胃肠炎暴发。
对公共卫生实践有何启示？：夏季幼儿园儿童和小学生中无症状诺如病毒感染率相对较低。无症状儿童中的诺如病毒基因型与有症状病例中流行的基因型相似。无症状诺如病毒感染在引起急性胃肠炎暴发中可能起有限作用。
