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Daily biting rate ofAn. arabiensis(number of bites per human and per night) in the villages of Andranonahoatra, Soanierana and Analamiranga. Mosquitoes were collected by human landing indoors (blue line) and outdoors (red dashed line). Indoor residual spray (IRS) with DDT and pyrethroids were performed in February 2003 and February 2004, respectively; the Maroharona commune remained untreated.
