埇桥区2005～2016年疟疾传播媒介监测结果分析

Analysis of surveillance results of malaria vectors in Yongqiao District 2005-2016

目的掌握疟疾传播蚊种及密度,为评估疟疾传播风险提供依据。方法 2005~2010年采用人诱半通宵加清晨50顶蚊帐搜捕法监测蚊种及密度,2012~2016年采用诱蚊灯全通宵方法监测蚊种及密度,对疟疾传播媒介和疫情监测资料进行分析。结果 2005~2016年未发现中华按蚊以外的其他按蚊。2005~2010年中华按蚊叮人率分别为34.882、15.112、18.714、14.794、2.814和3.048只/人·夜,2012~2016年中华按蚊平均灯诱密度分别为0.400、0.250、0.250、0.250、0.250只/灯·夜。疟疾病例主要集中在2005~2010年,期间共报告7 804例,除1例输入性恶性疟外,均为本地感染间日疟,病例以7~10月份为多。最后1例本地感染间日疟病例发生于2012年10月,2013~2016年输入6例恶性疟。结论埇桥区仍是中华按蚊地区,蚊媒密度较低,存在疟疾病例输入风险,但导致输入性疟疾病例续发传播的风险不大。

Objective To understand the species and densities of malaria vectors so as to provide evidence for assessing the risks of malaria transmission. Methods Mosquito species and density data in 2005 -2010 and 2012 -2016 years, re- spectively, are derived from outdoor semi - overnight trapping with human baits plus indoor early morning 50 mosquito nets, and outdoor overnight trapping with mosquito lamp. Malaria vectors ~md malaria prevalence data were statistically analyzed. Results No Anopheles other than Anopheles sinensis was found in 2005 -2016. In 2005 -2010 years, the man - biting rate of Anopheles sinensis was 34.882, 15. 112, 18. 714, 14.794, 2. 814 and 3. 048 bites per person per night, respec- tively. Besides, the average lamp - trap rate in 2012 - 2016 was 0. 400, 0. 250, 0. 250,0. 250 and 0.250 bites per lamp per night respectively. Malaria cases were mainly concentrated in 2005 -2010 years. During the period, 7804 cases were reported, except for 1 case of imported faleiparum malaria, all of which were local vivax malaria cases, and the cases were mainly occurred in 7 - 10 months. The last 1 cases of local vivax malaria case occurred in October 2012, 6 cases of impor- ted falciparum malaria were found in 2013 - 2016. Conclusion Anopheles sinensis is still a single malaria vector in Yongqiao District. There is a risk of imported malaria cases, but the risk of re - transmission of imported malaria cases is not high.