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Mosquitoes score in chemical war

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Key weapons in the fight against malaria, pyrethroid insecticides, are losing their edge. Over the past decade, billions of dollars have been spent on distributing long-lasting pyrethroid-treated bed nets and on indoor spraying. Focused in Africa, where most malaria deaths occur, these efforts have greatly reduced the disease's toll. But they have also created intense selection pressure for mosquitoes to develop resistance.

"Data are coming in thick and fast indicating increasing levels of resistance, and also of resistance in new places," says Jo Lines, an entomological epidemiologist and head of vector control at the Global Malaria Programme of the World Health Organization (WHO) in Geneva, Switzerland. The WHO now intends to launch a global strategy to tackle the problem by the end of the year.

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Comments (1)

  1. One does not have to be a rocket scientist to understand that resistance is the logical result of all the chemicals being used. At Soper Strategies we have understood this unfortunate dilemma when working with pesticides. That is also the reason that our strategies are aimed at green, permanent, integrated and uncompromised solutions. With the emphasis on green.. The WHO has been aiming their programs too much on involvement of communities, instead of leaving the responsibilities for mosquito-borne disease combat with local authorities. Add to this the extensive use of pesticides and one knows why we are dealing with increasinging problems. With all the modern technologies that we have available today, eradication of mosquitoes and the close-up monitoring of re-emergence, are easier then ever before. The problem should be tackled at the source and not be aimed at prevention of the problem (bednets).

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