Mosquitoes have become resistant to repellents
Kolkata: The preference for chemical repellents instead of using mosquito nets has made malarial mosquitoes immune, according to an expert in mosquito-borne diseases.
"Anopheles stephensi which spreads malaria in Indian cities has long become resistant to DDT, malathion and other traditional insecticides. Now they are showing resistance to widely used mosquito repellents too," Chief Entomologist of Kolkata Municipal Corporation Debasish Biswas told a news agency on World Malaria Day today.
"Recent surveys show that 80-85 percent of those who use mosquito repellents in liquid or coil form suffer from malaria, while it is only 3-4 percent for those using mosquito curtains," Biswas, who researched mosquito-borne diseases at the premier School of Tropical Medicine, said.
According to him, the mosquitoes have developed a mechanism which helped them bypass the efficacy of insecticides.
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