Evaluation of Long-Lasting Microbial Larvicides in Reducing Malaria Transmission and Clinical Malaria Incidence

"In 2015: Two sites each in Kakamega and Vihiga counties in western Kenya will be randomly selected and treated with larvicides (intervention) and the other two sites will serve as control (no-intervention). Temporary habitats will be treated with FourStar® controlled release granule formulation, semi-permanent habitats will be treated with 90 day briquettes, and permanent habitats with 180 day briquettes. No retreatment.~Starts from 2016, a total of 34 clusters in the two study sites will be assigned to treatment or control by a block randomization method. The Bti treatment will be the same as in 2015. The retreatment interval will be 4-5 months. After the third treatment, no treatment will be performed for the next 8 months. After this, a cross over will be performed. Previous control sites will receive 3 rounds of the same LLML treatment at appropriate time intervals and previous treatment sites will not receive any LLMLs."