Close banner

Support Outside Online

Love Outside?

Help fund our award-winning journalism with a contribution today.

Contribute to Outside

Mosquitoes Resistant to Net Pesticide

Study says malaria may rise

Troubling new research indicates that a common pesticide used in mosquito nets is increasingly ineffective, weakening the cheapest and easiest way to combat malaria deaths in sub-Saharan Africa. The study, published today in the Lancet Disease Journal, compared malaria infection rates before and after nets treated with deltamethrin were introduced to a village in Senegal. Initial results indicated that the nets were highly effective, but by December 2010 scientists found a resurgence in new cases of the disease. Worse, nearly 40 percent of mosquitoes tested showed a genetic resistance to the pesticide, four times the amount found before the nets were first introduced. Aid agencies have long touted insecticide-treated nets as an inexpensive, technologically simple way to beat malaria, a disease that kills more than 800,000 people each year. But some analysis of nets' long-term efficacy and the success of the broader global campaign to fight malaria suggest more mixed results.

Read more at Reuters

Support Outside Online

Our mission to inspire readers to get outside has never been more critical. In recent years, Outside Online has reported on groundbreaking research linking time in nature to improved mental and physical health, and we’ve kept you informed about the unprecedented threats to America’s public lands. Our rigorous coverage helps spark important debates about wellness and travel and adventure, and it provides readers an accessible gateway to new outdoor passions. Time outside is essential—and we can help you make the most of it. Making a financial contribution to Outside Online only takes a few minutes and will ensure we can continue supplying the trailblazing, informative journalism that readers like you depend on. We hope you’ll support us. Thank you.

Contribute to Outside
Filed To: News