大理市某小学1起乙型流行性感冒暴发疫情的调查

Survey on an influenza B outbreak in a primary school of Dali City

目的分析大理市某小学1起流行性感冒暴发疫情的原因,为学校流行性感冒的预防控制工作提供参考。方法进行现场流行病学调查、卫生学调查,采集部分典型患者的咽拭子进行流感病毒核酸检测。结果该校各个班级均有病例,累计发病121例,罹患率47.27%。用PCR法对5例患者的咽拭子进行流感病毒核酸检测,其中2例结果显示为B型流感病毒核酸阳性。结论证实此次为1起以教师为传染源由乙型流行性感冒病毒引起的流感暴发疫情。提示应加强学校日常卫生管理工作、卫生知识的宣传工作和提高人群流感疫苗的接种率。

[Objective]To analyze the reason of an influenza outbreak in a primary school of Dali City, provide reference for the prevention and control of influenza in schools. [Methods]The epidemiological investigation and hygiene survey was used in this study. The pharynx swabs were collected from some typical patients to detect the influenza virus nucleic acid.[Results]The cases were reported in every class, and there were a total of 121 cases, with an attack rate of 47.27%. The pharynx swabs were collected from 5 patients, to detect the influenza virus nucleic acid by PCR, and 2 samples were positive for influenza B virus. [Conclusion]This influenza outbreak is caused by influenza B virus with teachers as infectious source. The result indicated that it is necessary to strengthen daily health management and publicity of health knowledge in school, and improve the influenza vaccination rate.