In-house testing of mosquitos returned with a positive sample of West Nile Virus in Dillon Park.

The samples were collected by the Indiana State Department of Health. There has not been any notification of humans being infected with the virus in Noblesville.

West Nile virus can cause West Nile fever, a mild form of the illness, which can include fever, headache, body aches, swollen lymph glands or a rash. Some people will develop a more severe form of the disease affecting the nervous system, including inflammation in the brain and spinal cord, muscle paralysis or death. People who think they may have West Nile virus should see a healthcare provider.

The Noblesville Street Department is checking ponds in the area and the Noblesville Parks and Recreation Department is looking for standing water inside the park. The county health department is out spraying tonight with three trucks to cover the area quickly.

"To be safe, all residents are encouraged to use bug spray when outdoors," said Mayor John Ditslear. "The city and county are taking all steps to remove mosquitos through larvacide, spraying and monitoring."

As a preventative measure years ago, the Noblesville Street Department began controlling mosquitos at the larval stage with larvacide. Larvicides kill larvae in the breeding habitat before they can mature into adult mosquitoes and disperse - helping to reduce the adult mosquito population in nearby areas.

"We've received so much rain that large standing water is not getting stagnate where mosquito larvae are hatching. It could come from smaller areas like watering cans or puddles," said Noblesville Street Commissioner Patty Johnson. "Since we began larvacide, we've had less issues with mosquitos. Catching them before they hatch is the best option."

The Indiana State Health Department provides the following tips:

• Avoid being outdoors when mosquitoes are active (especially late afternoon, dusk to dawn and early morning).

• Apply an EPA-registered insect repellent containing DEET, picaridin, IR3535, oil of lemon eucalyptus or para-menthane-diol to clothes and exposed skin.

• Cover exposed skin by wearing a hat, long sleeves and long pants in places where mosquitoes are especially active, such as wooded areas.

• Install or repair screens on windows and doors to keep mosquitoes out of the home.

Mosquitoes breed in standing water. Even a container as small as a bottle cap can become a breeding ground, according to officials. Residents should take these steps:

• Discard old tires, tin cans, ceramic pots or other containers that can hold water.

• Repair failed septic systems.

• Drill holes in the bottom of recycling containers left outdoors.

• Keep grass cut short and shrubbery trimmed.

• Clean clogged roof gutters, particularly if leaves tend to plug up the drains.

• Frequently replace the water in pet bowls.

• Flush ornamental fountains and birdbaths periodically.

• Aerate ornamental pools, or stock them with predatory fish.