马拉硫磷杀虫剂对埃及伊蚊的抗药性：实验室条件和通过成虫昆虫学监测的现场实验方法。
Malathion insecticide resistance in Aedes aegypti: laboratory conditions and in situ experimental approach through adult entomological surveillance.
机构信息
Zoonoses Surveillance Unit, Municipal Secretary of Health, Foz do Iguaçu, Brazil.
Latin-American Institute of Life Sciences and Nature, Federal University of Latin American Integration, Foz do Iguaçu, Brazil.
出版信息
Trop Med Int Health. 2020 Oct;25(10):1271-1282. doi: 10.1111/tmi.13474. Epub 2020 Sep 6.
OBJECTIVE
In Brazil, the most common method of controlling outbreaks of arbovirus is by the use of chemical sprays, which kill the insect vector, Aedes aegypti. The main objective of this study was to evaluate the resistance of Ae. aegypti to the insecticide, malathion, in situ. The location of this study was the municipality of Foz do Iguaçu, in the state of Paraná, Brazil.
METHODS
Ultra-low-volume (ULV) fogging equipment was used, by vehicle, to apply the insecticide in situ, and mosquito populations after treatment were compared with those of control areas. The resistance of strains collected from the municipality was compared to the Rockefeller strain under laboratory conditions.
RESULTS
We found 220 adult female specimens and 7423 eggs of Ae. aegypti in the areas subjected to UBV treatment, whereas 245 adult females and 10 557 eggs were found in the control areas. The UBV treatment area showed no significant difference compared to the control area, for all the indices. Mortality of the Rockefeller colony varied more quickly when there were slight variations in malathion concentration than the Foz do Iguaçu population.
目的
在巴西，控制虫媒病毒病暴发的最常见方法是使用化学喷雾，杀死埃及伊蚊这一昆虫媒介。本研究的主要目的是就地评估埃及伊蚊对杀虫剂马拉硫磷的抗药性。本研究的地点位于巴西巴拉那州的福斯杜伊瓜苏市。
方法
使用超低容量（ULV）喷雾设备，通过车辆将杀虫剂就地喷洒，并比较处理后的蚊虫种群与对照区域的蚊虫种群。将从该市收集的菌株的抗药性与洛克菲勒株在实验室条件下进行比较。
结果
在接受 UBV 处理的区域发现了 220 只成年雌性标本和 7423 只埃及伊蚊卵，而在对照区域发现了 245 只成年雌性和 10557 只埃及伊蚊卵。与对照区域相比，所有指数在 UBV 处理区域均无显著差异。当马拉硫磷浓度略有变化时，洛克菲勒种群的死亡率变化比福斯杜伊瓜苏种群更快。
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