Chin A C, Chen C D, Low V L, Lee H L, Azidah A A, Lau K W, Sofian-Azirun M
Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, 50603, Malaysia.
Tropical Infectious Diseases Research and Education Centre (TIDREC), University of Malaya, Kuala Lumpur, 50603, Malaysia.
J Econ Entomol. 2017 Oct 1;110(5):2247-2251. doi: 10.1093/jee/tox183.
This study was conducted using the glass chamber method to determine the susceptibility status of the dengue vector, Aedes aegypti (L.) from 11 states in Malaysia to commercial mosquito coils containing four different active ingredients, namely metofluthrin, d-allethrin, d-trans allethrin, and prallethrin. Aedes aegypti exhibited various knockdown rates, ranging from 14.44% to 100.00%, 0.00% to 61.67%, 0.00% to 90.00%, and 0.00% to 13.33% for metofluthrin, d-allethrin, d-trans allethrin, and prallethrin, respectively. Overall, mortality rates ranging from 0.00% to 78.33% were also observed among all populations. Additionally, significant associations were detected between the knockdown rates of metofluthrin and d-allethrin, and between metofluthrin and d-trans allethrin, suggesting the occurrence of cross-resistance within pyrethroid insecticides. Overall, this study revealed low insecticidal activity of mosquito coils against Ae. aegypti populations in Malaysia, and consequently may provide minimal personal protection against mosquito bites.
本研究采用玻璃箱法，以确定马来西亚11个州的登革热媒介埃及伊蚊（Aedes aegypti (L.)）对含有四种不同活性成分（即甲氧氟氯菊酯、右旋烯丙菊酯、右旋反式烯丙菊酯和丙炔菊酯）的商用蚊香的易感性状况。埃及伊蚊对甲氧氟氯菊酯、右旋烯丙菊酯、右旋反式烯丙菊酯和丙炔菊酯的击倒率各不相同，分别为14.44%至100.00%、0.00%至61.67%、0.00%至90.00%和0.00%至13.33%。总体而言，在所有种群中也观察到死亡率在0.00%至78.33%之间。此外，还检测到甲氧氟氯菊酯与右旋烯丙菊酯的击倒率之间以及甲氧氟氯菊酯与右旋反式烯丙菊酯的击倒率之间存在显著关联，这表明拟除虫菊酯类杀虫剂中出现了交叉抗性。总体而言，本研究揭示了蚊香对马来西亚埃及伊蚊种群的杀虫活性较低，因此可能对防止蚊虫叮咬提供的个人防护作用极小。
