Fogging has unintended effect: Insecticide-resistant Aedes mosquitoes, warn experts

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Kuala Lumpur: Two species of dengue virus mosquitoes — Aedes aegypti and Aedes albopictus — have recently been found to have developed a stronger resistance to insecticides, said researchers.

They said this added resistance contributes to the risk of a widespread dengue outbreak and must be taken into account when designing new measures to control mosquito populations and curb dengue fever. “Genetic mutations in these mosquitoes in response to the widespread use of insecticides are likely the cause ,” epidemiologist and health informatician Professor Datuk Awang Bulgiba Awang Mahmud of Universiti Malaya was quoted as saying in the New Straits Times.

The researchers agreed that spraying fine insecticide is only an ineffective, short-term measure against the spread of dengue virus as it does not affect the mosquitoes’ breeding sites and larvae. “Mosquito fogging has always been a short-term measure which targets only adult mosquitoes.“It does not get rid of the larvae, nor does it get rid of mosquito breeding sites.

 

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