West Nile Virus Outbreak in Texas: Seven Harris County Residents Infected and Five Cases Detected in Williamson County
July 2024
Texas is currently experiencing an outbreak of West Nile Virus, with seven residents from Harris County and five mosquito samples from Williamson County testing positive for the virus. The virus, which is most commonly spread through the bite of an infected mosquito, can cause serious disease and symptoms such as fever, headache, body aches, nausea and vomiting.
According to Harris County Public Health officials, people tend to develop symptoms about two weeks after being bitten. The virus can also lead to more severe neuroinvasive disease where the virus enters the central nervous system.
The Texas Department of State Health Services recommends practicing the 'Four Ds' as precautionary measures: use insect repellent containing DEET, picaridin or oil of lemon eucalyptus; dress in long sleeves and long pants when you are outside; stay indoors at dusk and dawn when mosquitoes are most active; and drain standing water where mosquitoes breed.
The first West Nile Virus detection in Texas this year was nearly a month ago. The virus can be contracted from mosquito bites, and mosquitoes often contract the virus from biting infected birds.
Here are some precautions you should take to avoid coming in contact with infected mosquitoes:
- Drain flower pots, pet dishes, blocked gutters, or any containers that may hold standing water to prevent mosquito breeding grounds.
- Treat any water that cannot be drained.
- Dress in long sleeves and pants when outdoors to minimize exposed skin.
- Defend by using an EPA-approved insect repellent to protect yourself from mosquito bites.
As of now, there are no vaccines or medications to treat the virus. Most people infected with West Nile might not even realize it and recover without medical intervention. However, about 1 in 150 cases can become quite severe and lead to neuroinvasive disease.
The following counties in Texas have reported positive West Nile Virus cases this season:
- Harris County: Seven human cases
- Williamson County: Five mosquito samples tested positive
- Montgomery County: One human case
- Bexar County: One human case