The A. aegypti mosquito is the main vector for dengue and zika viruses. This mosquito has developed resistance to common insecticides. We've shown that a species of roundworm is able to kill 85-100% of mosquito larvae in the lab. As a follow-up study we need to submit the roundworm to an “acid test” to verify its efficacy in urban settings. If the roundworm passes the test this could be an easy and cheap method to control mosquito populations and prevent the spread of dengue and zika viruses.