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目的调查塔城市某学校一起流感疫情的暴发原因,为今后防控提供借鉴。方法对流感样病例所在群体进行流行病学调查与分析,并采集患者咽拭了进行流感病毒分离鉴定。结果学校共有2 481师生,140人发病,罹患率为5.58%;14例病人咽喉部分泌物样本送地区CDC检测,检出8份B型流感病毒株。结论根据流行病学、临床特征及实验室检测结果确定本次疫情为B型流感爆发疫情,教室空气流通不畅及未实施严格隔离措施是此次暴发关键因素。
Objective To investigate the causes of the outbreak of a flu epidemic in a school in Tacheng City and provide references for future prevention and control. Methods Epidemiological investigation and analysis were carried out on the population of influenza-like cases, and the patients were swallowed for influenza virus isolation and identification. Results A total of 2 481 teachers and students were admitted to the school, 140 were affected and the attack rate was 5.58%. Throat secretions samples from 14 patients were sent to CDC by region for detection of 8 influenza B virus strains. Conclusions According to epidemiology, clinical characteristics and laboratory test results, the outbreak was confirmed as an outbreak of influenza B, poor air circulation in the classroom and no strict isolation measures were the key factors of this outbreak.