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The lack of effective tools to control Aedes aegypti mosquito populations has resulted in the continued expansion of dengue virus, Zika virus and CHIKV. Some recent attempts at curbing mosquito populations have resulted in reductions in mosquito density but not reductions in human disease. AGO traps consist of a pail with hay and water to attract eggbearing female mosquitos and a sticky lining to which the insects adhere. Previous studies have shown that placing three AGO traps outside of 85% of homes in a community resulted in an 80% reduction in adult mosquito populations but the studies did not assess rates of mosquito-borne diseases in humans.
In the new work, Tyler Sharp, of the CDC, and colleagues randomly selected 290 households in Puerto Rican communities that had AGO trap interventions and 349 households in communities without AGO traps. 175 household members from intervention communities and 152 from non-intervention communities were enrolled in the study. Blood samples were collected from each participant to detect CHIKV infection and surveys recorded demographic information as well as data on mosquito repellent and bed net use and frequency of mosquito bites.
A total of 114 participants (34.9%) were seropositive for CHIKV. Among people who spent most of their daytime hours inside the community they lived in, 10.3% were seropositive for CHIKV in communities with AGO traps whereas 48.7% were positive for CHIKV in communities without traps.
https://www.sciencedaily.com/releases/2019/07/190725150924.htm
