Contact tracing, with indoor spraying, can curb dengue outbreak
Contact tracing, combined with targeted, indoor residual spraying of insecticide, can greatly reduce the spread of the mosquito-borne dengue virus, finds a study led by Emory University.
In fact, this novel approach for the surveillance and control of dengue fever – spread by the same mosquito species that infects people with the Zika virus – was between 86 and 96 percent effective during one outbreak, the research shows. By comparison, vaccines for the dengue virus are only 30-to-70-percent effective, depending on the serotype of the virus.
Science Advances published the findings, which were based on analyses from a 2009 outbreak of dengue in Cairns, Australia.
“We’ve provided evidence for a method that is highly effective at preventing transmission of diseases carried by the Aedes aegypti mosquito in a developed, urban setting,” says the study’s lead author, Gonzalo Vazquez-Prokopec, a disease ecologist in Emory’s Department of Environmental Sciences. “We’ve also shown the importance of human movement when conducting surveillance of these diseases.” Dr. Vazquez-Prokopec is a faculty member in the PBEE program.