2017—2019年深圳市龙岗区登革热媒介白纹伊蚊监测结果分析

Surveillance results of dengue vector Ae.Albopictus in Longgang District,Shenzhen,2017-2019

目的分析2017—2019年深圳市龙岗区白纹伊蚊密度季节消长和幼虫孳生特点,为制定当地登革热防控措施提供参考依据。方法2017—2019年,在深圳市龙岗区11个街道设立监测点,采用布雷图指数(BI)评价伊蚊幼虫密度,诱蚊诱卵指数(MOI)评价伊蚊成虫密度;对不同月份、不同环境蚊媒密度(BI、MOI)及其BI和MOI的相关性进行分析。结果2017—2019年平均BI为3.52,3年间BI呈逐年上升趋势,不同年份BI和不同月份BI差异有统计学意义(P<0.01),2017、2018年BI高峰为9月份(分别为6.09、5.81),2019年为5月(BI为6.11);不同环境的BI差异有统计学意义(P<0.01),居民区BI最高,为5.00。平均MOI为5.04,3年间呈波动趋势,不同年份MOI差异无统计学意义(P>0.05),不同月份MOI差异有统计学意义(P<0.01),2017年8月、2018年9月、2019年6月MOI最高,分别为9.90、8.82、9.83;不同环境的MOI差异有统计学意义(P<0.01),公园MOI最高(5.49)。同期之间BI与MOI呈正相关(P<0.01)。结论深圳市龙岗区白纹伊蚊密度较高,有明显季节性,加强登革热媒介伊蚊监测和风险评估,为制定科学合理的蚊虫控制措施提供依据。

ObjectiveTo analyze seasonal variation and larval breeding characteristics in the density of Ae.albopictus in Longgang District,Shenzhen,2017-2019,so as to provide a reference for the development of local dengue feverprevention and control measures.Methods From 2017 to 2019,surveillance points were set up in 11 sub-districts ofLonggang District,the density of Ae.Albopictus larvae was evaluated by the Breteau index(BI),and that of Ae.Albopictusadult was evaluated by the mosq-ovitrap index(MOI).Analyze the mosquito density(BI,MOI)in different months and dif-ferent environments and the correlation between BI and MOI.ResultsThe average BI was 3.52 in 2017-2019.During thethree years,the BI showed an increasing trend year by year.The BI of different years and of different months were statisti-cally significant(P<0.01).Of these,the BI peak in 2017 and 2018 were September(BI=6.09 and 5.81,respectively),and in 2019 was May(BI=6.11).The BI of different environments was statistically significant(P<0.01),among whichthe BI of residential areas was the highest(BI=5.00).The average MOI was 5.04 in 2017-2019.During the three years,the MOI showed a fluctuating trend.The MOI of different years were not statistically significant(P>0.05),but the MOI ofdifferent months were statistically significant(P<0.01).The MOI peak in 2017 was August(MOI=9.90),in 2018 wasSeptember(MOI=8.82),and in 2019 was June(MOI=9.83).The MOI of different environments was statistically signifi-cant(P<0.01),among which the MOI of park was the highest(MOI=5.49).BI and MOI in the same period were posi-tively correlated(P<0.01).ConclusionThe density of Ae.Albopictus in Longgang District was high and was obviouslyseasonality.Strengthen the monitoring and risk assessment of Ae.Albopictus will provide the reference for the scientific andreasonable mosquito control measures.