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目的了解长沙市某寄宿学校流感爆发疫情的原因及流行病学特征。方法对该起流感病爆发疫情进行现场流行病学调查分析和实验室采样检测。结果从2月15日~3月9日,该校共有336名学生和教职工出现发热(体温≥38℃)、头晕头痛、咽痛和咳嗽等症状,罹患率为4.35%,无重症病例和死亡病例。共采集了25份病人鼻、咽拭子标本,有21份为H1流感病毒核酸阳性,并分离出18份H1流感病毒株。根据患者的临床症状与体征、流行病学调查、实验室检测,确定为一起甲型流感爆发疫情。结论经启动突发公共卫生事件应急预案,采取综合性防制措施,此起爆发疫情得到了有效控制。
Objective To understand the causes and epidemiological characteristics of flu outbreak in a boarding school in Changsha. Methods Epidemiological investigation and laboratory sampling of the outbreak of flu-susceptible disease were conducted. Results From February 15 to March 9, a total of 336 students and faculty members of the school experienced fever (body temperature ≥ 38 ° C), dizziness, headache, sore throat and cough, with an attack rate of 4.35%, without severe cases and Deaths. A total of 25 nasal and throat swab specimens were collected, of which 21 were positive for the H1 influenza virus and 18 H1 influenza strains were isolated. According to the patient’s clinical symptoms and signs, epidemiological investigations, laboratory tests, identified as an outbreak of influenza A. Conclusions After the emergency plan for emergency public health emergencies was launched, comprehensive prevention and control measures were taken and the outbreak was effectively controlled.