Number of Years with at Least One Aedes aegypt Reported Between 1995 and 2016 (image) Entomological Society of America Share Print E-Mail Caption A county-level survey conducted in 2015 and 2016 by the US Centers for Disease Control and Prevention shows the historic occurrence of Aedes aegypti mosquitoes between January 1995 and December 2016 in the United States. Counties with black dots had new, previously unreported surveillance records in the second round of the survey in 2016, reflecting increased attention on surveillance for mosquitoes. 'Prompted by the Zika outbreak, states began work to better assess the distribution and abundance of these mosquitoes, locally,' says Rebecca Eisen, Ph.D., research biologist with CDC's Division of Vector-Borne Diseases. (Note: The map indicates presence, not abundance, of Ae. aegypti, and the map does not indicate levels of risk for the spread of any specific disease.) Credit Centers for Disease Control and Prevention Usage Restrictions Maintain caption and credit Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.