Current tools for measuring malaria transmission intensity have limited sensitivity when transmission is low. Robust surveillance systems are needed to monitor reduced transmission and prevent the rapid reintroduction in areas undergoing elimination. Serologic tools based on the antibody response to parasite and vector antigens are potential tools for transmission measurements. This study examined the serologic evidence of vector exposure and malaria endemicity in the western Kenyan highlands along a transmission intensity cline. Total IgG levels to P. falciparum MSP-119 and Anopheles...