Ecological and insecticide resistance surveillance of dengue vector <i>Aedes</i> in Yunnan border region of China

ZHENG Yu-ting, YANG Chun-mei, YANG Ming-dong, JIANG Jin-yong

doi:10.11853/j.issn.1003.8280.2022.01.007

Chinese Journal of Vector Biology and Control >

2022 , Vol. 33 >Issue 1: 38 - 43

DOI: https://doi.org/10.11853/j.issn.1003.8280.2022.01.007

Special Investigation on Dengue Vectors Topics

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

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1. Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Yunnan Institute of Parasitic Diseases Innovative Team of Key Techniques for Vector Borne Disease Control and Prevention, Training Base of International Scientific Exchange and Education in Tropical Diseases for South and Southeast Asia, Yunnan Institute of Parasitic Diseases Pu'er, Yunnan 665000, China;
2. Kunming Medical University, Kunming, Yunnan 650504, China

Received date: 2021-09-27

Online published: 2022-02-17

Supported by

Special Project of Chinese Center for Disease Control and Prevention "Special investigation on dengue vectors Aedes"

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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

Cite this article

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 . DOI: 10.11853/j.issn.1003.8280.2022.01.007

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