关键词: 双层叠帐法, BG-trap诱捕器法, 白纹伊蚊

Abstract: Objective To compare the effectiveness of two vector surveillance methods, double mosquito net and BG-mosquito trap (BG-trap), for collecting mosquitoes on the spot of dengue fever, and to provide a basis for rational surveillance approaches. Methods From September to October, 2017, 160 residential areas were selected from 12 districts and counties of Hangzhou, Zhejiang province, China, which contained the core area, warning area, and surveillance area. The double mosquito net and BG-trap were both used for emergency surveillance of vector Aedes albopictus in residential areas and the surrounding environments. The interval between the two traps was longer than 100 m. The surveillance lasted for 30 min. The biting index (mosquitoes/hour) and mosquito index (mosquitoes/h) were calculated. One-way analysis of variance was used to analyze two mosquito trapping methods in different areas. The paired t test was used to compare the efficiency between the two methods. Results Both the double mosquito net and BG-trap were able to capture Ae. albopictus, 903 mosquitoes were captured by BG-trap trap and 456 by the double mosquito net method. BG-trap had the highest efficiency in the monitoring area, followed by the warning area and the core area (F=9.951, P<0.05). There was no significant difference in the efficiency of the double mosquito net between different areas (F=2.677, P=0.072). According to the results of paired t test, BG-trap had significantly higher efficiency than the double mosquito net in the core area, warning area, and all areas (t=2.786, 2.351, 3.976, all P<0.05). Conclusion Both surveillance methods can be used to monitor the vector mosquito. The double mosquito net method is suitable for routine adult mosquito density surveillance, while BG-trap is more suitable for the emergency surveillance of mosquito-borne infectious diseases such as dengue fever.

Key words: Double mosquito net, BG-mosquito trap, Aedes albopictus