云南省瑞丽市2013年登革热暴发的流行病学分析

Epidemiological study on an outbreak of dengue fever in Ruili, Dehong prefecture of Yunnan province, China

目的分析云南省瑞丽市2013年登革热暴发疫情的流行病学特征,为登革热控制提供依据。方法对所有登革热病例进行流行病学个案调查,采用登革热病毒NS1抗原法检测病例血清标本,采用布雷图指数法进行蚊媒密度监测。结果本次疫情流行历时104 d,共确诊病例232例,其中本地感染145例,缅甸输入87例。流行季节为8-11月,病例主要集中在瑞丽市城区（124/232,53.45%）;男女性别比为1.23∶1,发病年龄最小1岁,最大80岁,以20~49岁年龄组为主;职业分布以商业服务、农民和家务及待业者居多。结论此次疫情为瑞丽市首次发生登革热本地流行;采取伊蚊综合控制措施,布雷图指数≤5.0,疫情可得到有效控制。

Objective To investigate the epidemiological characteristics of the 2013 outbreak of dengue fever in Ruili of Yunnan province, China, and to promote management of dengue fever epidemics. Methods An investigation was conducted anlong all dengue fever cases. Serum samples of all cases were tested by NS1 antigen detection. The density of vector mosquitoes was determined by the Breteau index （BI）. Results This outbreak of dengue fever lasted 104 days, and there were 232 confirmed cases, of whom 145 were locally infected cases, and 87 were imported cases from Myanmar. Cases were mainly distributed in the urban areas of Ruili （53.45%, 124/232）. The male-to-female ratio was h23 ： i; the patients were mainly 20-49 years old, with the youngest 1 year old and the oldest 80 years old. Most of the patients were business people, farmers, housekeepers, and unemployed persons. Conclusion This was the first local outbreak of dengue lever in Ruili, which was caused by both Aedes albopictus and Ae. aegypti. With combined control of Aedes sp. mosquitoes and BI not higher than 5.0, the epidemic of dengue fever can be controlled.