北京市登革热病例流行病学特征及疫情风险评估

The analysis of dengue fever epidemic situation and risk assessment in Beijing

目的根据北京市登革热病例诊疗信息、全市病媒生物监测和机场蚊媒监测数据，分析北京市登革热病例流行病学特征和北京市出现登革热暴发疫情的风险。方法采用SPSS软件分析2006-2011年北京市登革热病例流行病学特征。利用CO2诱蚊灯法调查北京市各区县（居民区、公园绿地、医院等作为监测点）和机场蚊媒种群构成。结果2006-2011年北京市累计报告登革热病例27例，均为输入性病例，病例感染地点排在第一位的是东南亚（37．0％，10／27）。病例年龄在25—59岁之间，男女性别比为3．5：1。病例的职业以干部和职员为主（66．7％）。近几年，北京市全市白纹伊蚊整体构成比略有增加。机场周边白纹伊蚊构成比较小（0．3％，69／22981），主要分布在建筑工地（59．4％，41／69）、河边（13．0％，9／69）和树林（11．6％，8／69），而登革病毒核酸检测均为阴性。结论病例及蚊媒监测结果提示，北京出现本市感染病例和暴发疫情的风险非常小。考虑到全球及我国疫情呈上升趋势，北京市应继续做好蚊媒病原监测，并根据监测结果调整疫情防控措施。

Objective To evaluate the epidemiologic features and outbreak risk of dengue fever in Beijing according to the case information, data of vehicle monitoring in the whole city and airport. Methods Data of the reported dengue fever cases in Beijing was collected and analyzed for their epidemiologic features with SPSS software. CO2 trapping lamp method was used to monitor the constituent ratio of mosquito in Beijing city and airport. Results A total of 27 dengue fever cases were confirmed. They were all intro- duced cases （range 25 - 59 years）. Most of the cases were infected in Southeast Asia. The gender ratio was 3.5：1 （male：female）. Most of the reported cases were cadres and office workers （66.7%）. The constituent ratio of aedes albopictus increased in recent years. Aedes albopictus was distributed mainly in construction site and riverside （ viral nucleic acid was negtive）. We found that the constituent ratio （ 0. 3 %, 69/ 22981 ） was very lower in airport. Conclusions The monitoring data revealed that it was impossible to occur case infected and outbreak in Beijing. But we should pay more attention to vector biology monitoring because the status of the disease has been increased in the whole world and China.