 Development of irrigated ricefields which house both An . arabiensis and An . funestus had created a new anthropic environment . Moreover manpower imported from malarious coastal areas for rice cultivation and also for building large temples , could have brought P falciparum . After several outbreaks the disease became endemic up to 0000 . In 0000 a malaria eradication programme based on DDT spraying and drug chemoprophylaxis and chemotherapy was launched . By 0000 malaria was eliminated and DDT spraying cancelled . Only 0 foci were kept under surveillance with irregular spraying until 0000 . The prophylaxis and treatment centres ( "centres de nivaquinisation" ) were kept open up to 0000 . The catholic dispensary of Analaroa , 000 km NE of Tananarive , opened in 0000 and worked without interruption up to now . The malaria diagnosis has always been controlled by microscopy . [ Sen. 00, subscore: 0.00 ]: Moreover manpower imported from malarious coastal areas for rice cultivation and also for building large temples , could have brought P falciparum . After several outbreaks the disease became endemic up to 0000 . In 0000 a malaria eradication programme based on DDT spraying and drug chemoprophylaxis and chemotherapy was launched . By 0000 malaria was eliminated and DDT spraying cancelled . Only 0 foci were kept under surveillance with irregular spraying until 0000 . The prophylaxis and treatment centres ( "centres de nivaquinisation" ) were kept open up to 0000 . The catholic dispensary of Analaroa , 000 km NE of Tananarive , opened in 0000 and worked without interruption up to now . The malaria diagnosis has always been controlled by microscopy . Its registers are probably the more reliable source of information on malaria in the area . 