遵义市首例输入性基孔肯雅热病例流行病学调查及蚊媒监测分析

Epidemiological investigation on the first imported case of chikungunya fever and mosquito vector surveillance in Zunyi

目的了解1例输入性基孔肯雅热确诊病例的流行病学史,通过掌握同期蚊媒监测情况,为进一步加强蚊媒传染病防控工作提供科学依据。方法采用《基孔肯雅热流行病学调查方案》进行流行病学调查,对遵义市新蒲新区2019年蚊媒监测数据进行统计和描述性分析。结果该病例为1例从缅甸入境的输入性确诊病例,为贵州省遵义市首例基孔肯雅热病例,未造成本土继发流行。2019年蚊媒人诱停落法监测显示成蚊密度为0.19只/h(其中白纹伊蚊构成比为12.68%)。布雷图指数为0~34.55,10月废旧物品处布雷图指数最高,为34.55,5月建筑工地蚊幼路径指数最高,为2.35。结论遵义市新蒲新区存在蚊媒传染病暴发流行的风险因素,应加强监测,提高应急处置能力,预防可能出现的本土流行。

Objective To know the epidemiological history of a confirmed imported case of chikungunya fever,master the mosquito vector surveillance during the same period,and provide a scientific basis for further strengthening the prevention and control of mosquito vector infectious diseases.Methods Using the "Chikungunya Fever Epidemiological Survey Scheme" to conduct the epidemiological investigation,establishing mosquito vector surveillance database via Excel 2010,and adopting descriptive statistical analysis to catch the epidemiological characteristics of the disease.Results The confirmed case imported from Myanmar,the first case of chikungunya fever in Zunyi City of Guizhou Province,did not caused a secondary epidemic in the city.Mosquito vector monitoring in 2019 showed that the density of adult mosquitoes was 0.19 insects per hour(including Aedes albopictus composition ratio of 12.68%).The Breitou indexes were between 0 and 34.55,and the highest value was 34.55 found in waste items in October.The highest path index of mosquito larvae was 2.35 at the construction sites in May.Conclusion There were risk factors for outbreaks of mosquito-borne infectious diseases in Xinpu District of Zunyi City,and monitoring should be strengthened to improve emergency response capabilities to prevent possible local epidemics.