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In malaria battle, indoor bug spraying has unintended consequence

Two species of disease-carrying mosquitoes shift to outdoor biting habit on African island

Anopheles funestus

THIS BITES  After years of exposure to indoors pesticides spraying, a species of malaria-spreading mosquito (Anopheles funestus) may be expanding its repertoire of attacks.

James Gathany/CDC

By Susan Milius

- More than 2 years ago

AUSTIN, TEXAS — Success of an indoor spraying campaign to combat malaria on an African island may have started a worrisome trend in local mosquito evolution.