Abstract:

Objective To provide a scientific basis for the prediction, prevention and control of dengue fever epidemic by studying dengue virus infection in mosquitoes, vector species density, and antibody level of dengue virus in human populations. Methods The descriptive epidemiological method was used for statistical analysis on vector monitoring and dengue antibody level in healthy human populations in Chenzhou from 2008 to 2013. Results In total, 789 healthy persons were tested from 2008 to 2013 and the IgG positive rate against dengue virus was 5.32%. As to vectors, 842 of Aedes albopictus were collected. The density of Ae. albopictus was 0.22/h. The highest density of adult Ae. albopictus among different habitats was in park with 0.31/h. The container index (CI) of the larvae was 10.33, with the highest CI in August (12.70) and in waste recycling centers (18.50). The mosquito and oviposition positive index (MOI) was 6.92% and the highest MOI was in park with 10.82%. Eighteen groups of Ae. albopictus tested negative for dengue virus. Conclusion There was no dengue fever virus in adult Aedes mosquitoes in Chenzhou, however, there were natural transmitting vector and dengue fever antibody for healthy populations. Surveillance, prevention, and control of dengue fever should be strengthened gradually.

Key words: Dengue fever, Vector monitoring, Surveillance

摘要：

目的 了解郴州市成蚊携带登革热病毒状况、伊蚊密度与健康人群登革热病毒抗体水平,为预测登革热流行趋势和制定防治措施提供科学依据。方法 收集2008-2013年郴州市登革热媒介监测和健康人群登革热病毒抗体水平数据,用描述性流行病学方法进行分析。结果 2008-2013年共检测789名健康人员,登革热病毒IgG阳性率为5.32%;共捕获伊蚊842只,均为白纹伊蚊,其成蚊密度为0.22只/h,不同生境成蚊密度以公园最高,达0.31只/h;伊蚊幼虫容器指数为10.33,以6月(12.70)及废品收购站(18.50)最高;诱蚊诱卵指数为6.92%,以公园最高(10.82%);18份白纹伊蚊标本均未检出登革热病毒。结论 郴州市虽未在伊蚊成蚊中检出登革热病毒,但是传播媒介自然存在,且在健康人群中已检出登革热病毒抗体,因此应持续加强登革热的监测与防控。

关键词: 登革热, 媒介调查, 监测