目的 观察白纹伊蚊密度监测时诱蚊诱卵指数(mosquito and oviposition positive index,MOI)和伊蚊成蚊停落指数(landing index,LI)变化趋势,分析不同生境和时期下2种监测方法指标(MOI和LI)相关性及风险等级评估一致性.方法 2021年6-9月,每月在上海市松江区15个街道、镇监测点运用诱蚊诱卵器法监测伊蚊密度,在放置诱蚊诱卵器的7d前、当天以及回收7d后分别开展人诱停落法监测,计算MOI和LI7d前、LI当天、LI7d后,采用Spearman相关进行MOI与LI7d前、LI当天、LI7d后的相关分析,Kappa检验进行风险评估一致性评价,灰色关联度方法分析与温度、湿度、风速的关联程度.结果 6-9月上海市松江区MOI和LI均呈现先升后降变化趋势,MOI在8月达到最高值19.46,平均LI在7月达到最高值3.51,轮胎聚集地、公园密度较高,学校、医院密度低于其他生境.MOI与LI7d前、LI当天、LI7d后的Spearman相关系数分别为0.393、0.396和0.342(均P＜0.05),Kappa值分别为-0.084、0.012和-0.075(均P＞0.05);MOI与温度、湿度、风速的灰色关联度为0.784、0.771和0.751,LI当天则为0.793、0.785和0.774.结论 MOI与LI具有一定相关性,且2种指标均与主要气象因素的关联较紧密,但在登革热风险等级评估上不存在一致性,指标MOI较LI更加灵敏.
Comparative analysis of mosquito ovitrap and human landing trap in monitoring Aedes mosquito density
Objective To observe the variation trends of mosquito and oviposition positive index(MOI)and landing index(LI),compare their correlation and consistency of risk grade assessment under different habitats and periods during the surveillance of Aedes albopictus.Methods Surveillance by mosquito-ovitrap was conducted at 15 street and town monitoring sites in Songjiang District of Shanghai City from June to September 2021,while human landing catch was used 7 days before the laying of mosquito-ovitrap(LI7d-before),on the same day(LIday)and 7 days after the collection of mosquito-ovitrap(LI7d-after)to calculate MOI and LI7d-before,LIday,LI7d-after.Spearman correlation was used for correlation analysis,and Kappa test was used for risk assessment consistency evaluation between MOI and LI and gray correlation degree analysis for their correlation degree with temperature,humidity and wind speed.Results From June to September in Songjiang District,both MOI and LI increased first and then decreased.MOI reached the highest value of 19.46 in August,and average LI reached the highest value of 3.51 in July.The densities of Aedes albopictus in the tire gathering place and parks were higher than other habitats,and those in schools and hospitals were lower.Spearman correlation coefficients of MOI and LI7d-before,LIday,LI7d-after were 0.393,0.396 and 0.342,respectively,with statistical significance(all P＜0.05),Kappa values were-0.084,0.012 and-0.075(all P＞0.05).The grey correlation degree of MOI with temperature,humidity and wind speed was 0.784,0.771 and 0.751,which of LIday was 0.793,0.785 and 0.774.Conclusion There was a certain correlation between MOI and LI,and both indexes were closely correlated with major meteorological factors.While there was no consistency in the assessment of dengue risk grade.Compared with LI,MOI was more sensitive.
Aedes albopictusMosquito and oviposition positive indexLanding indexCorrelationConsistency
NETL
NSTL
万方数据
