某儿童福利院诺如病毒聚集性疫情调查分析

Investigation of clustering epidemic caused by norovirus in a welfare center for children

目的通过对儿童福利院诺如病毒疫情的调查分析,查找可疑病原和传播模式,为疫情控制提供科学依据。方法采用现场流行病学方法调查病例发生情况和可疑传播因素。采用RT-PCR法对采集的肛拭子进行检测。结果本次疫情从2018年4月9日开始至4月14日结束,共发现15例病例,均为该福利院儿童,儿童罹患率为65.2%。发病高峰期为4月11日,临床表现均为呕吐。调查共采集12份肛拭子进行病原学检测,其中6份肛拭子检出GⅡ型诺如病毒。结论该起事件为病例缺乏管理和呕吐物处理不当引起的GⅡ型诺如病毒聚集性疫情。

Objective To investigate a norovirus epidemic in a children’s welfare home and to find suspected pathogens and transmission modes, so as to provide the evidence for epidemic control. Methods The case occurrence and suspicious transmission factors were investigated by the on-site epidemiological methods, and the collected anal swabs were detected by RT-PCR. Results The epidemic began on April 9, 2018 and ended on April 14, 2018. A total of 15 cases were found, and all of which were children of the welfare home. The prevalence rate was 65.2%. The peak incidence was on April11 and the main clinical manifestation was vomiting. The pathogen test showed that 6 of 12 anal swabs were positive for norovirus GII. Conclusion This case is a GII type norovirus epidemic caused by lack of management of the case and improper handling of the vomitus.