一起学校流感暴发的调查和分析

目的调查此次疫情暴发的原因和特点，防止类似疫情再次发生。方法按2005年广东省卫生厅《广东省流感样病例暴发疫情报告及调查处理工作指引（试行）》进行。结果全校学生902人，发病74例，罹患率为8．20％。整个疫情流行过程为17日，7—9岁年龄组发病较多，男女发病无显著差别。一、二年级学生和在校午休学生罹患率较高，具明显的班级和宿舍聚集性；病毒分离培养为B型流感病毒。结论此次为一起由B型流感病毒引起的流感暴发疫情，暴发原因为未及时隔离治疗病人、疫情报告迟缓、室内通风换气不够和学校未开展流感疫苗接种等。

Survey and Analysis of An Outbreak of Influenza in a School

Objective To investigate the causes and characteristics of this outbreak of influenza and to find effective precautionary measures to prevent the occurrence of epidemic situation like this. Methods All the programs are executed according to the guidelines and epidemic situation reports of influenza outbreak in Guangdong province （ for trial implementation） of Guangdong provincial health department of Guangdong province in 2005. Results 74 out of 902 students in this school had influenza, with an incident rate of 8.20%. This epidemic situation lasted 17 days. The majority d the patients were 7-9 years old, and there was no significant difference in the incident rate between boys and girls. The students who had noon break in dormitory or in Class one or in Class two had higher incident rate. The incident rate had obvious oonvlation with classes and dormitories. The isolated virus was influenza virus type B. Conclusion The epidemic situation was caused by the outbreak of influenza B virus. The causes of the outbreak included patients were not isolate and treated promptly, delay reporting of the outbreak, inadequate indoor ventilation, and no influenza vaccination of the school children.