北京市某寄宿制中学诺如病毒感染的突发公共卫生事件调查

Investigation of the public health emergency of norovirus infection in a boarding middle school

目的调查学校诺如病毒突发疫情的原因,为预防学校传染病疫情提供依据。方法搜索此次疫情相关病例,采用描述性流行病学和病例对照研究方法,采集标本使用荧光定量PCR检测诺如病毒,不同组别罹患率采用χ^(2)检验进行分析。结果本次疫情共有病例77例,教师为39例,学生为38例,罹患率分别为23.2%和4.2%。采集的39份生物标本和19件环境食品标本中,诺如病毒阳性9例,其中8例为G Ⅱ型,1例为GⅡ+G Ⅰ型。结论当学校传染病疫情发生时,及时发现和报告并采取相应的防控措施,能够有效控制疫情的发展。

Objective To explore the cause of norovirus public health emergency in order to provide a scientific basis for prevention and control of infectious disease epidemuic.Methods Descriptive epidemiology and case control design were used.Samples were collected for norovirus detection by quantitative fluorescence(PCR).Chi-square test was used to analyze the incidence of different groups.Results The total number of cases in this epidemic was 77,39 of them were teachers,and 38 of them were students.The incidence rates were 23.2%and 4.2%.Among biological specimens and environmental and food specimens,there were 9 positive for norovirus,including 8 cases of GⅡand 1 case of GⅡ+GⅠ.Conclusion When the epidemic situation of infectious diseases occurs in schools,timely detection and report and corresponding prevention and control measures can effectively prevent and control the epidemic situation.