Ecological and insecticide resistance surveillance of dengue vector Aedes in Yunnan border region of China

doi:10.11853/j.issn.1003.8280.2022.01.007

Abstract

Abstract: Objective To investigate the population density and insecticide resistance of dengue vector Aedes in Yunnan border region of China, and to provide a scientific basis for rational use of insecticides to control dengue fever. Methods In 2020, Breteau index (BI) method was used to monitor the population density of dengue vector Aedes in residential areas of Ruili, Gengma, Mengla, Lancang, Hekou, and Mangshi in Yunnan border region, at a frequency of once a month in January-April and December and twice a month from May to November; the adult mosquito contact tube method was used to detect the resistance of adult Ae. aegypti and Ae. albopictus to nine insecticides, i.e., lambda-cyhalothrin, deltamethrin, beta-cypermethrin, permethrin, propoxur, bendiocarb, fenitrothion, malathion, and chlorpyrifos. Results Aedes larvae were active all year round at the field investigation sites, with the peak of BI in July-September; Of the six border counties and county-level cities, Ruili city had the highest mean BI of 15.62 and Mangshi city had the lowest mean BI of 3.03. Both Ae. aegypti and Ae. albopictus reached resistance level to lambda-cyhalothrin and permethrin and were sensitive to bendiocarb, malathion, and chlorpyrifos. Conclusion There is a high population density of dengue vector Aedes in Yunnan border region, and they have developed resistance to both lambda-cyhalothrin and permethrin. It is suggested that relevant departments should strengthen the surveillance of the density and insecticide resistance level of dengue vector Aedes larvae and guide the rational use of insecticides to slow down the development of insecticide resistance.

Key words: Aedes aegypti, Aedes albopictus, Surveillance, Breteau index, Insecticide, Insecticide resistance

摘要： 目的了解云南边境地区登革热媒介伊蚊种群密度及其对杀虫剂的抗性水平，为合理使用杀虫剂控制登革热提供科学依据。方法 2020年采用布雷图指数（BI）法在云南边境地区瑞丽、耿马、勐腊、澜沧、芒市和河口县（市）居民区开展登革热媒介伊蚊幼蚊种群密度监测，其中1－4和12月每月监测1次，5－11月每月监测2次；采用成蚊接触筒法检测埃及伊蚊和白纹伊蚊对高效氯氟氰菊酯、溴氰菊酯、高效氯氰菊酯、氯菊酯、残杀威、虫威、杀螟硫磷、马拉硫磷和毒死蜱等9种杀虫剂的抗性。结果现场调查点伊蚊幼蚊全年均有活动，其中BI 7－9月为高峰期；在6个边境县（市）中，瑞丽市平均BI最高，为15.62，芒市平均BI最低，为3.03。埃及伊蚊和白纹伊蚊对高效氯氟氰菊酯和氯菊酯均达到抗性级别，对虫威、马拉硫磷、毒死蜱均敏感。结论云南边境地区登革热媒介伊蚊种群密度较高，对高效氯氟氰菊酯和氯菊酯2种杀虫剂均产生了抗性。建议相关部门应加强登革热媒介伊蚊幼蚊密度和杀虫剂抗性水平监测，科学合理使用杀虫剂，减缓抗性产生。

关键词: 埃及伊蚊, 白纹伊蚊, 监测, 布雷图指数, 杀虫剂, 抗药性

CLC Number:

ZHENG Yu-ting, YANG Chun-mei, YANG Ming-dong, JIANG Jin-yong. Ecological and insecticide resistance surveillance of dengue vector Aedes in Yunnan border region of China[J]. Chinese Journal of Vector Biology and Control, 2022, 33(1): 38-43.

郑宇婷, 杨春梅, 杨明东, 姜进勇. 云南边境地区登革热媒介伊蚊生态学及抗药性监测[J]. 中国媒介生物学及控制杂志, 2022, 33(1): 38-43.

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