Sustained, Area-Wide Control of Aedes aegypti Using CDC Autocidal Gravid Ovitraps

Roberto Barrera,Manuel Amador,Ryan R. Hemme,Gilberto Félix,Verónica Acevedo

doi:10.4269/ajtmh.14-0426

Abstract

We have shown that the Centers for Disease Control and Prevention (CDC) autocidal gravid ovitraps (AGO trap) reduced the Aedes aegypti population and prevented mosquito outbreaks in southern Puerto Rico. After showing treatment efficacy for 1 year, we deployed three traps per home in an area that formerly did not have traps and in a site that served as the intervention area. Two new areas were selected as reference sites to compare the density of Ae. aegypti without traps. We monitored mosquitoes and weather every week in all four sites. The hypotheses were the density of Ae. aegypti in the former reference area converges to the low levels observed in the intervention area, and mosquito density in both areas having control traps is lower than in the new reference areas. Mosquito density in the former reference area decreased 79% and mosquito density in the new reference areas was 88% greater than in the intervention areas.

Highlights

Dengue is the most common arboviral disease in the world, and one that has continued to increase in incidence over the last five decades.[1]
We have shown that the Centers for Disease Control and Prevention (CDC) autocidal gravid ovitraps (AGO trap) reduced the Aedes aegypti population and prevented mosquito outbreaks in southern Puerto Rico
The hypotheses were the density of Ae. aegypti in the former reference area converges to the low levels observed in the intervention area, and mosquito density in both areas having control traps is lower than in the new reference areas

Summary

Introduction

Dengue is the most common arboviral disease in the world, and one that has continued to increase in incidence over the last five decades.[1] Because vector control is the only means to control dengue virus transmission currently available,[2] the sustained increase of dengue probably reflects lack of significant impact or at the best, a partial impact of vector control without which dengue figures would be even larger. The control of dengue vectors is complicated by a lack of trained personnel and resources and by adopting reactive approaches to dengue control only during epidemics. Population growth has increased urban complexity in mosquito habitat compartmentalization and limits the required access of vector control personnel to premises.[3] Additional factors limiting dengue control are elevated levels of insecticide resistance and lack of evaluation of the efficacy of vector control measures.[4]

Methods

Results

Conclusion