September 4, 2015
Hamilton County Health Department
Division of Vector Control
The Hamilton County Health Department’s Division of Vector Control conducts regular West Nile Virus (WNV) surveillance activities throughout the county from May – October. CDC Gravid traps are set throughout the county on a weekly basis in order to catch adult biting mosquitoes. The mosquitoes are sorted by species and those capable of transmitting WNV are retained for testing by the Health Department and the Indiana State Department of Health. To date 28,607 mosquitoes have been collected and tested for WNV and St. Louis Encephalitis. A total of 45 mosquito pools collected from 25 different locations have tested positive for WNV.