Fig. 1.

Collection sites of gravid females An. Arabiensis in Burkina Faso. Nanoro is located in the Sudano-Sahelian zone, which extends throughout much of the central part of the country. In this zone, vegetation is constituted of an arid savannah and the climate is characterized by a short rainy season from July to September. Bobo Dioulasso, or Bobo, and Kodeni are situated in the Sudano-Guinean zone at the Southwest of the country. In this zone, the type of vegetation is humid savannah, and the rainy season extends from June to October.