Prevent Exposure to West Nile Virus

Duncanville, TX - On August 18, 2020 Dallas County collected West Nile Virus infected mosquitoes from five traps within Duncanville's 75116 and 75137 zip codes.

Mosquitoes become infected with the West Nile Virus (WNV) when they feed on the blood of an infected bird. It is then spread when an infected mosquito bites a human or animal.

What is West Nile Virus?

West Nile Virus is a flavivirus historically found in Africa, West Asia, and the Middle East. It is one of a group of viruses spread by mosquito bites. The virus can infect humans, birds, mosquitoes, horses and some other animals. WNV can cause mild to severe illness. Most people who get infected do not get sick. Some get a flu-like illness. In rarer cases, the virus can affect the brain and spinal cord and cause encephalitis, and can be fatal. WNV is cause for staying informed - not for panic. Learning about the virus and ways to prevent infection is key. Steps you take can help protect you from other mosquito-borne diseases, too.

What are symptoms of WNV?

  • No symptoms in most people. Approximately 80% of people who are infected with WNV will not show any symptoms and will not know they have it.
  • Mild infection in some people. Up to 20% of the people who become infected will display mild flu-like symptoms, including headache and body aches, nausea, vomiting, as well as swollen lymph glands, or a skin rash on the chest, stomach and back. Symptoms typically last a few days. This is known as West Nile fever.
  • Serious infection in a few people. About one in 150 people infected with WNV will develop severe illness, such as West Nile Encephalitis, West Nile Meningitis or West Nile Meningoencephalitis. The symptoms can include headache as well as neck stiffness, confusion and high fever. These symptoms may last several weeks or even months. The neurological effects may be permanent.
  • WNV is known to cause death in rare circumstances

Mosquito control is provided by Dallas County.