The first human case of the West Nile Virus this year in Colleyville has been confirmed this week, according the city of Colleyville. Tarrant County Public Health found positive results of the West Nile Virus in mosquito test samples at the 3200 block of Scarborough Land and the 4100 block of Windermere Court. City crews began treating the two areas with larvicide and flogging yesterday and will continue again this evening from 9-11 p.m., Colleyville Environmental Compliance worker Randy Bright said. Typical symptoms of the virus include muscle aches and a slight fever both lasting a few days, however symptoms for more serious cases may include high fever, stiff neck, headaches, disorientation, tremors, seizures, paralysis or disorientation, according to a press release. Residents in the area are encouraged to drain standing water, dress in long-sleeved shirts and pants when outside and use insect repellant containing DEET.