目的 分析某幼儿园一起诺如病毒感染聚集性疫情特征,为预防控制此类事件提供参考。方法 采用描述性流行病学方法,分析疫情的三间分布、临床特征和感染原因,采集部分病例和厨工肛拭子标本进行诺如病毒检测。结果 该园共194人,17人发病,罹患率8.76%,病例仅限1个班级。患者主要症状为呕吐,其次是腹痛和发热,无腹泻。8份病例标本检出6份诺如病毒核酸阳性,2份厨工标本未检出。结论 该起疫情由诺如病毒感染引起,首发病例没有及时隔离及呕吐物处置不当是疫情发生的原因。

Objective To analyze the characteristics of a norovirus infection cluster epidemic in a kindergarten,and to provide reference for the prevention and control of such incidents. Methods Descriptive epidemiological method was used to analyze the spatial,temporal and population distribution,clinical characteristics and infection causes of the epidemic.Anal swab specimens from some cases and kitchen workers were collected for norovirus testing. Results There were 194 people in the kindergarten,17 of whom had the disease,the attack rate is 8.76%,and all the cases were in the same class.Of the 8 patient specimens,6 tested positive for norovirus nucleic acid.Two specimens of kitchen workers did not test positive. Conclusion The epidemic was caused by norovirus infection.The failure to isolate the first case and the improper disposal of vomit were the reasons for the outbreak.