Epidemiological characteristics of norovirus epidemics in Haidian District from 2015 to 2022
GUO Li1, CAI Wei2, LIU Feng2, SHAO Yunping2
1. Emergency Office, Haidian District Center for Disease Control and Prevention, Beijing 100094, China; 2. Haidian District Center for Disease Control and Prevention, Beijing 100094, China
Abstract：Objective To understand the epidemiological characteristics of the norovirus epidemics in Haidian District, Beijing Municipality from 2015 to 2022, so as to provide insights into epidemic prevention and control. Methods The epidemiological characteristics, case data, and laboratory testing of norovirus epidemics were collected in Haidian District from 2015 to 2022, and the temporal distribution, spatial distribution, population distribution, and norovirus detection were analyzed using a descriptive epidemiological method. Results A total of 208 norovirus epidemics involving 3 530 cases were reported in Haidian District from 2015 to 2022, with a median attack rate of 25.00% (interquartile range, 18.35%). The main pathogens detected were type GⅡ, accounting for 87.98% (183 cases), and the main transmission mode was interpersonal transmission, accounting for 93.27% (194 cases). Norovirus epidemics peaked from March to June and October to December, accounting for 44.71% (93 epidemics) and 44.23% (92 epidemics), and predominantly occurred in schools and preschool institutions, accounting for 51.92% (108 epidemics) and 40.38% (84 epidemics). The median age of norovirus infected cases was 8 (interquartile range, 13) years. There were 1 920 males and 1 610 females, with a ratio of 1.19︰1. The positive rates of case specimens, key population specimens and environment smeared specimens in epidemic units were 74.32%, 13.91% and 5.86%, respectively. Conclusions The norovirus epidemics in Haidian District from 2015 to 2022 was mainly caused by type GⅡ and spread from person to person. The epidemics peaked in winter and spring, and schools and preschool institutions were the key units of prevention and control.
郭黎, 蔡伟, 刘锋, 邵云平. 2015—2022年海淀区诺如病毒疫情流行特征[J]. 预防医学, 2024, 36(2): 135-138.
GUO Li, CAI Wei, LIU Feng, SHAO Yunping. Epidemiological characteristics of norovirus epidemics in Haidian District from 2015 to 2022. Preventive Medicine, 2024, 36(2): 135-138.
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