The City of Commerce along with assistance from Texas A&M University-Commerce has been testing mosquitoes for various diseases by trapping them and sending them to the Department of State Health Services. On August 12, 2015, emergency management officials released information notifying citizens that a positive test was received for the West Nile virus. Although the areas that tested positive on August 12 are now testing negative, the City has received two additional tests that have come back with a positive reading for West Nile virus.