TOKYO: Mosquitoes that transmit dengue and other viruses have evolved growing resistance to insecticides in parts of Asia, and novel ways to control them are desperately needed, new research warns. Health authorities commonly fog mosquito-infested areas with clouds of insecticide, and resistance has long b
TOKYO: Mosquitoes that transmit dengue and other viruses have evolved growing resistance to insecticides in parts of Asia, and novel ways to control them are desperately needed, new research warns.
"In Cambodia, more than 90 per cent of Aedes aegypti mosquitoes have the combination of mutations that results in an extremely high level of resistance," Kasai told AFP.That meant insecticide levels that would normally kill almost 100 per cent of mosquitoes in a sample killed only around seven per cent of the insects.
The research found several genetic changes were linked with resistance, including two that occur close to the part of mosquitoes targeted by pyrethroid and several other insecticides. "There is growing evidence that there may not be a place for current insecticide formulations in controlling populations of key mosquito pests," Webb told AFP.He said new chemicals are needed, but authorities and researchers also need to think of other ways to protect communities, including vaccines.
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