County officials reported the sixth human case of West Nile virus for 2017 on Wednesday—the third human case reported this week.
A Lewisville resident was recently diagnosed with West Nile fever, officials said.
Most people who are infected with the West Nile virus develop no symptoms or such mild symptoms that they do not feel ill. West Nile fever is a less serious form of the illness, although the symptoms can last a long time, according to health officials. Symptoms can include a headache, fatigue, skin rash, swollen lymph glands and eye pain along with fever.
The more serious form of the illness invades the nervous system and can lead to paralysis and death.
For more information on how to limit exposure, visit the county health department's website.