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目的分析广东省云浮市首起登革热疫情特征和传播媒介伊蚊的密度及季节消长规律,探讨登革热流行风险。方法结合国家疾病监测信息系统和云浮市登革热疫情调查数据,对云浮市首起报告登革热疫情特征进行描述性分析;2014年7-11月全市共设置10个监测点,采用布雷图指数(BI)法监测伊蚊幼虫密度,诱蚊诱卵器法监测伊蚊成蚊密度。结果 2014年云浮市共报告登革热病例22例,发病率为0.91/10万,其中境内输入性登革热病例10例,本地病例12例。全市伊蚊幼虫密度监测BI为3.46~6.58,云浮市城区诱蚊诱卵指数平均为3.39。结论云浮市防控登革热工作形势日趋严峻,存在因登革热输入性病例引发本地疫情暴发的低风险;应全面开展蚊媒监测和病例溯源工作,加强对蚊媒密度及相关自然和社会因素研究。
Objective To analyze the epidemic characteristics of Dengue Fever and the density and seasonal fluctuation of Aedes aegypti in Yunfu City, Guangdong Province, and to explore the epidemic risk of dengue fever. Methods Based on the data from the National Disease Surveillance and Monitoring System and the epidemiological survey of Dengue Fever in Yunfu City, a descriptive analysis of the first report on the epidemic situation of Dengue Fever was conducted in Yunfu City. From July to November 2014, a total of 10 monitoring sites were set up in the city. Brevet Index (BI) Law to monitor the density of mosquito larvae, mosquito ovitrap method to monitor Aedes mosquito density. Results In 2014, 22 cases of dengue fever were reported in Yunfu City, with an incidence of 0.91 / 100 000, including 10 cases of imported dengue fever and 12 local cases. The city’s mosquito larvae density monitoring BI was 3.46 ~ 6.58, Yunfu City, the average mosquito-ovulation index was 3.39. Conclusion The situation of prevention and control of dengue fever in Yunfu City is worsening day by day. There is a low risk of outbreak of epidemic situation caused by imported dengue fever. Mosquito vectors monitoring and case traceability should be carried out in an all-round way to strengthen mosquito vector density and related natural and social factors.