Knox County, TN (KCHD / WOKI) – The Knox County Health Department is reporting two cases of La Crosse virus in children this month, marking the first reported illnesses of the year. Both children required hospitalization but are now recovering at home.
La Crosse virus is a mosquito-borne infection that does not cause symptoms in most people. If symptoms develop, they can include fever, headache, nausea, and vomiting. Rarely, people develop severe disease, which can lead to potential encephalitis (inflammation of the brain). Severe disease occurs most often in children under 16 years old. Most severe cases require hospitalization but will recover with supportive care. However, up to 15 percent of cases can have major neurologic complications.
The best way to avoid a La Crosse infection is to prevent or reduce mosquito bites. La Crosse is spread by the bite of an Aedes mosquito, which bites primarily during dawn and dusk in wooded areas. People also should:
- Use insect repellents containing DEET, Picaridin, IR3535, or oil of lemon eucalyptus.
- Treat clothing with repellents such as permethrin.
- Wear long-sleeved shirts and pants if in, or near, wooded areas and cover strollers/baby carriers with mosquito netting.
- Control the mosquito population in your yard by reducing standing water on the property.
- Once a week, turn over items that hold water, such as swings, buckets, toys, small swimming pools, and flowerpot saucers.
If you notice any new neurological issues (seizures, mental changes, drowsiness/trouble staying awake) in your child, seek emergency care. For any other concerns, contact your child’s pediatrician.
