Indiana records first case of West Nile Virus in 2025

VANDERBURGH COUNTY, Ind. — Indiana has recorded its first case of the West Nile Virus in 2025.

The Indiana Department of Health announced Tuesday that the virus was reported for the first time this year in a Vanderburgh County resident.

IDOH said officials have found West Nile Virus activity in 56 samples taken from mosquitoes in 15 counties across the state so far this year. A total of 11 West Nile Virus cases were recorded in the Hoosier state last year.

Health officials noted that West Nile Virus cases tend to increase during the summer months as mosquito season ramps up.

Most people who contract the virus will experience no symptoms or only develop minor flu-like symptoms. A small number of people can develop a more dangerous form of the disease that can go on to affect the nervous system, induce inflammation in the brain and spinal cord, and lead to muscle paralysis or death.

Common symptoms include:

• High fever
• Severe headache
• Neck stiffness
• Muscle weakness or paralysis
• Nausea or vomiting
• Sore joints
• Confusion

“We have already had mosquitoes test positive for WNV this season,” said State Health Commissioner Lindsay Weaver. “With large amounts of recent rainfall and projected high temperatures continuing this week, Hoosiers in all parts of the state should take steps to remove breeding sites around their homes.”

Hoosiers can follow these recommended steps to reduce their risk:

• Drain or discard old tires or other containers that can hold water
• Repair septic systems
• Drill holes in the bottom of containers that are left outside
• Clean clogged roof gutters
• Keep your grass short and shrubs trimmed
• Frequently replace the water in pet bowls
• Install or repair window screens and doors to keep mosquitoes out of your home

More information can be found by visiting the Indiana Mosquito-Borne Activity Dashboard.