Abstract: Objective To study on the applicability of the route index environment of city emergency monitoring of Aedes albopictus larvae, and provides scientific support for the prevention and control of Ae. albopictus. Methods Investigation was carried out in outdoor environments of 162 dengue fever outbreak regions (including the core area, warning area, monitoring area) of Hangzhou city in 2017 for Ae. albopictus larvae by Breteau index (BI) which were calculated by electronic map method and route distance conversion method. The impacts of BI calculated by two different methods were compared. The BI difference between the electronic map method and the path distance method was compared with the Wilcoxon paired test. The difference between the standard rate of the core area, the warning area and the monitoring area calculated by the electronic map method and the path distance method was compared with Chi square test. Results The median of BI in the electronic map method was 0.20, and the median of the route distance method BI was 1.60. The difference was statistically significant (Z=-8.191, P=0.000). The electronic map method and route distance method were used to calculate the rate reaching control level of Ae. albopictus in the core area, the warning area and the monitoring area (BI<5 is up to the standard). There was a statistically significant difference between the three regions in control rate calculated by the route distance method (χ²=8.509, P=0.011), and there was no difference between the three regions in control rate calculated by the electronic map method (χ²=0.867, P=1.000). BI<5, the Aedes emergency control level when dengue fever outbreak, was converted into the route index (RI) being RI <3.3 by means of route distance method, which was higher than the national standard GB/T 27771-2011 mosquito density control level C required RI ≤ 0.8. Conclusion The route index method is suitable for the emergency monitoring of Ae. albopictus in the urban environment and is more feasible. It can be an effective supplement to the BI method. The RI index in the national standard GB/T 27771-2011 can be used as the reference standard for the emergency control standard of dengue vector Aedes in the urban environment.

Key words: Aedes albopictus, Breteau index, Route index

摘要： 目的 研究路径指数（RI）法在城市外环境白纹伊蚊幼虫应急监测中的适用性，为白纹伊蚊监测方法的优化选择提供基础。方法 对杭州市本地2017年暴发登革热疫情的162个应急监测点（含核心区、警戒区、监控区）公共外环境开展白纹伊蚊幼虫布雷图指数（BI）调查。分别采用电子地图法、路径距离法换算调查户数，比较2种计算方法对外环境BI测量的影响。其中电子地图法与路径距离法计算BI差异的比较采用Wilcoxon配对检验，电子地图法与路径距离法计算的核心区、警戒区、监控区间达标率差异的比较采用χ²检验。结果 BI中位数电子地图法为0.20，路径距离法为1.60，差异有统计学意义（Z=-8.191，P=0.000）。路径距离法计算核心区、警戒区、监控区白纹伊蚊应急控制达标率，差异亦有统计学意义（χ²=8.509，P=0.011），电子地图法差异无统计学意义（χ²=0.867，P=1.000）。以路径距离法将登革热媒介伊蚊应急控制达标水平BI < 5换算成RI < 3.3，高于国家标准《GB/T 27771－2011病媒生物密度控制水平蚊虫》C级（RI≤0.8）的要求。结论 RI法适于城市外环境白纹伊蚊应急监测，且操作性更强，可成为BI法的有效补充。国家标准中的RI指标可作为城市登革热媒介伊蚊应急控制参考标准。

关键词: 白纹伊蚊, 布雷图指数, 路径指数