2023年重庆市某小学一起暴发性诺如病毒疫情流行病学调查分析  

Epidemiological investigation and analysis on an outbreak of norovirus infection in a primary school of Chongqing in 2023

作　　者：杨淋淋 邓雯文 秦静 殷静 唐小清 汪燕 YANG Linlin;DENG Wenwen;QIN Jing;YIN Jing;TANG Xiaoqing;WANG Yan Nan’an(Center for Disease Control and Prevention,Chongqing 400000,China)

机构地区：[1]重庆市南岸区疾病预防控制中心,重庆400000

出　　处：《寄生虫病与感染性疾病》2023年第3期131-135,共5页Parasitoses and Infectious Diseases

基　　金：重庆市科学技术项目(项目编号:CSTC2021jscx-gksb-N0005)。

摘　　要：目的调查重庆市南岸区某小学一起诺如病毒暴发疫情的感染来源、传播途径,为后续疫情防控工作提供参考依据。方法2023年2月对重庆市南岸区某小学诺如病毒暴发疫情进行现场流行病学调查,应用描述流行病学方法分析此疫情的流行病学特征、传播方式,使用SPSS 27.0软件进行统计分析,以P<0.05为差异有统计学意义。结果本次疫情共持续4 d;累计报告病例123例,罹患率16.49%;临床表现以呕吐为主;122例学生感染者平均年龄8.9岁;不同班级、年级学生诺如病毒罹患率差异有统计学意义(Х^(2)_(班级)=122.010,P=0.001;Х^(2)_(年级)=25.887,P=0.004);10份标本诺如病毒核酸检测阳性。结论此次疫情是一起GI型诺如病毒感染引起的暴发疫情,可能是因为共用学校厕所、拖把等方式交叉接触感染,继而经人际传播引起的。学校应关注舆情动态,做好与学生及家长的沟通交流,加强患者管控、疫情监测报告和校园清洁消毒,做好食品安全卫生培训及管理,强化健康教育宣教。Objective To investigate the infection source and transmission route of an outbreak of norovirus infection in a primary school in Nan’an District of Chongqing,and to provide reference for subsequent epidemic prevention and control work.Methods In February 2023,an field epidemiological investigation was conducted on the outbreak of norovirus in a primary school in Nan’an District of Chongqing.Descriptive epidemiology was used to analyze the epidemiological characteristics and mode of transmission of the epidemic.SPSS 27.0 was used for statistical analysis,and P<0.05 was considered statistically significant.Results The epidemic lasted for a total of 4 days,and a total of 123 cases were reported,with an attack rate of 16.49%.The clinical manifestation was mainly vomiting.The average age of 122 infected students was 8.9 years old.There were statistically significant differences in the attack rate among students from different classes,grades and floors(χ^(2)_(class)=122.010,P=0.001;χ^(2)_(grade)=25.887,P=0.004).Ten samples tested positive for norovirus nucleic acid.Conclusions The outbreak was caused by GI type norovirus infection,which may be caused by cross-contact infection by sharing school toilets,mops or other ways,and then by human-to-human transmission.Schools should pay attention to public opinion dynamics,communicate well with students and parents,strengthen patient control,epidemic monitoring reports and campus cleaning and disinfection,do a good job in food safety and hygiene training and management,and strengthen health education.

关 键 词：诺如病毒 暴发 疫情 调查分析 

分 类 号：R512.5[医药卫生—内科学] R181.3[医药卫生—临床医学]