南京市浦口区某小学一起流行性感冒暴发疫情调查

Investigation on influenza outbreak in a primary school in Pukou District of Nanjing

目的调查分析南京市浦口区某小学发生的一起流行性感冒暴发疫情的流行病学特征,为今后类似事件的调查处置工作提供参考。方法2022年10月25日至11月7日对南京市浦口区某小学一起流行性感冒暴发疫情进行流行病学调查,采集10份病例咽拭子标本,采用反转录PCR方法进行病毒核酸检测。结果本次流感暴发累计报告病例37例,患病率为2.70%。病例主要集中在一(15)班、二(15)班,有明显的聚集性。10份病例咽拭子标本中检出5份流感病毒核酸阳性,均为甲型H3病毒。死亡病例标本核酸检测结果显示甲型H3流感病毒阳性,呼吸道多病原检测尚未发现其他高致病性病原体。结论经流行病学调查及实验室检测,该起疫情为甲型H3亚型流感暴发疫情。

Objective To investigate and analyze the epidemiological characteristics of an outbreak of influenza in a primary school in Pukou District of Nanjing,and provide reference for the investigation and treatment of similar incidents in the future.Methods An epidemiological investigation was conducted on an influenza outbreak in a primary school in Pukou District of Nanjing from October 25 to November 7,2022.Throat swab specimens were collected from 10 cases,and reverse transcription PCR was used to detect the viral nucleic acid.Results A total of 37 influenza cases were reported in this outbreak,with a prevalence rate of 2.70%.The cases were mainly concentrated in class 1(15)and class 2(15),with obvious clustering.Out of 10 throat swab specimens,five tested positive for the nucleic acid of the influenza virus,all identified as A H3 subtype.The nucleic acid test results of the death case showed that influenza A H3 virus was positive,and no other highly pathogenic pathogens were found in the respiratory multi-pathogen test.Conclusion Epidemiological investigation and laboratory tests show that the outbreak is an influenza A H3 subtype outbreak.