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目的分析某中学一起流感疫情暴发的原因和特点,为学校流感防控提供参考和依据。方法采用现场流行病学个案调查和实验室检测相结合的方法开展调查。结果整个疫情流行过程为12d,疫情波及3个年级5个班级,具有明显班级聚集性,全校累计发病61例,罹患率3.21%,病毒分离培养为B型流感病毒。结论此次为一起B型流感病毒引起的流感暴发疫情。教室空气流通差、学校未严格落实晨检制度、未及时发现、隔离和治疗病人是该起疫情暴发的主要原因。
Objective To analyze the causes and characteristics of a flu outbreak in a middle school and provide references and evidences for prevention and control of influenza in schools. Methods A case-by-field epidemiological investigation combined with laboratory tests was conducted to investigate. Results The overall course of the outbreak was 12 days. The epidemic spread to 5 classes in 3 grades. There was obvious class aggregation. The cumulative incidence of the whole school was 61 cases and the attack rate was 3.21%. The virus was isolated and cultured as influenza B virus. Conclusion This is a flu outbreak caused by influenza B virus. Poor classroom air circulation, the school did not strictly implement the morning inspection system, failure to detect, isolate and treat patients is the main reason for the outbreak.