Ecological changes associated with anthropogenic ecosystem disturbances can influence
human risk of exposure to malaria and other vector-borne infectious diseases. This study in
Mwea, Kenya, investigated the pattern of insecticide use in irrigated and nonirrigated
agroecosystems and association with the density, survival, and blood-feeding behavior of
the malaria vector Anopheles arabiensis. The parity rates of adult An. arabiensis from
randomly selected houses were determined by examining their ovaries for tracheal …