Knockdown resistance mutations distribution and characteristics of Aedes albopictus field populations within eleven dengue local epidemic provinces in China

Abstract

This study showed that the multiple <i>kdr</i> mutations at codon 1016, 1532 and 1534 of <i>Ae. albopictus</i> were found in most areas of China. Two novel triple-locus genotype combinations, V/G+I/T+F/S and V/G+I/T+S/S, were detected in this study. In addition, the relationship between mosquito resistance and dengue fever outbreak should be further explored, especially considering the insecticide-usage history in different areas. The characteristic of spatial aggregation of <i>VGSC</i> gene mutation rates reminds us to notice the gene exchange and similarity of insecticide usage in the adjacent areas. The use of pyrethroids should be restricted to delay resistance development. New-type insecticides should be developed to adjust the changes in the resistance spectrum. Our study provides abundant data on the <i>Ae. albopictus kdr</i> gene mutation in China; these findings will be useful for the correlation analysis of molecular mechanism of insecticide resistance.