2017年上海松江区永丰街道某幼儿园一起聚集性呕吐及腹泻疫情调查分析

Investigation and analysis of a cluster vomiting and diarrhea epidemic in a kindergarten in Yongfeng Community,Songjiang District,Shanghai in 2017

目的:调查和分析一起幼儿园诺如病毒感染性腹泻暴发疫情,探讨其传播途径和方式,查找危险因子及传播因素,为制定有效防控措施提供科学依据。方法:应用现场流行病学调查方法进行调查,采集病例及从业人员肛拭子、水样、食品、环节样等标本进行检测分析。结果:共搜索到病例51例,总罹患率10.52%,样品中13份肛拭子和1个拖把检测出诺如病毒;教职工罹患率17.78%,幼儿罹患率9.77%,差异无统计学意义(P>0.05)。结论:根据现场流行病学调查和实验室结果,确定这是一起隔离不及时和消毒不严格引起的诺如病毒感染暴发疫情。

Objective:To investigate and analyze an outbreak of norovirus diarrhea in a kindergarten,explore its transmission routes and methods,and find risk factors and transmission factors for providing scientific basis for the formulation of effective prevention and control measures.Methods:Field epidemiological investigation methods were used to investigate and collect samples such as swabs,water samples,food,and link samples of cases and practitioners for detection and analysis.Results:A total of 51 cases were searched,the total incidence rate was 10.52%,and norovirus was detected in 13 swabs and 1 mop in the samples;the incidence rate of teaching staff was 17.78%and that of young children was 9.77%,and the difference was not statistically significant(P>0.05).Conclusion:Based on field epidemiological investigation and laboratory results,it is determined that this is an outbreak of norovirus infection caused by untimely isolation and lax disnifection.