Aedes aegypti resistance development to commonly used insecticides in Jakarta, Indonesia

Abstract

Aedes aegypti is the primary vector of various relevant arthropod-borne viral infectious diseases worldwide. The mosquito control is still mainly performed by using insecticides but their effectiveness is increasingly questioned nowadays. We here conducted a study on Ae. aegypti resistance development towards several commonly used insecticides in the capital city of Jakarta, Indonesia. In order to achieve this goal, Ae. aegypti eggs from Jakarta were collected with ovitraps and hatched in the insectary of the Gadjah Mada University, Indonesia. The F0 generations were used for WHO resistance tests and knockdown resistance (kdr) assays. Presented results clearly showed that there was resistance development of Ae. aegypti populations to the here tested pyrethroid insecticides (i. e. permethrin). Observed mortalities were less than 90% with highest resistance against 0.75% permethrin concentrations. Furthermore, a significant association of V1016G gene mutations with resistance phenotypes to 0.75% permethrin was observed. Nevertheless, the F1534C mutation did not show a significant correlation to resistance development. In conclusion, our results show that populations of Ae. aegypti mosquitoes within the city of Jakarta have developed resistance against several routinely used pyrethroid insecticides in local performed control programs. Thus, the regular verification/assessment of resistance development status will hopefully help in the future to assist local public health authorities in their mosquito control programs by recommending and managing the rotation of different routinely used insecticides with diverse effector mechanisms in order to delay Ae. aegypti resistance development.

Fig 1. Resistance profiles of Ae. aegypti from Jakarta.

Fig 2. Allele-specific PCR exemplaries on agarose gel.

(A) V1016G mutation, (B) F1534C mutation. Wt: Wild-type, Mh: Mutant homozygote, MHt: Mutant heterozygote, M: 50-bp DNA marker.

Fig 3. Phenotypes of Ae. aegypti population from Jakarta to 0.75% permethrin.

(A). Ratio on V1016G frequency, (B). Ratio on F1534C frequency.