St. Louis County public health officials announced mosquitoes carrying West Nile Virus have been discovered in the county. No human cases have been reported this year.

“Positive mosquito tests are a reminder that preventative measures are important,” said Dr. Faisal Khan, director of the department. “Even though serious West Nile Virus cases in humans are rare, it is important to minimize our exposure. We can do this by eliminating opportunities for mosquitoes to breed and multiply, and by taking steps to prevent mosquito bites.

Tips from St. Louis County to reduce in the opportunities for mosquitoes to breed and multiply

At least once a week, eliminate the sources of standing water around a home by draining garbage cans, buckets, toys, flowerpots, wading pools, pet dishes, and other objects. Turn them over to prevent them from refilling with water.

Fill any holes in the yard with sand or dirt.

Drill holes in the bottom of tire swings to allow water to drain.

Change the water in birdbaths at least once a week and keep all gutters cleaned out.

Treat birdbaths and ponds with products containing the active ingredient methoprene or Bti (Bacillus thuringiensis israelensis) to prevent mosquitoes from developing.

Ensure that drainage pipes are properly sloped. Flexible drainage pipe is commonly used to drain water from downspouts, but if not properly installed, they can hold water and breed mosquitoes.