Mosquitoes Test Positive for West Nile Virus in St. Louis County

It's the year's first pool of West Nile positive mosquitoes.

Michael Calhoun
July 19, 2018 - 12:35 pm
Mosquito sucking blood from human hand

© Alexander Zhiltsov |


CLAYTON (KMOX) -- Mosquitoes with West Nile Virus have been found in St. Louis County.

It's the year's first pool of West Nile positive mosquitoes, says Dr. Fred Echols, director of communicable disease control at St. Louis County Department of Health.

Where did these mosquitoes come from?

"We typically don't target just one specific area of the county. Our goal is to make sure individuals know we've received a positive test for West Nile Virus this season," he tells KMOX. "We have over a thousand trap sites across St. Louis County where we collect mosquitoes and bring them back to our facility to screen them for diseases."

He says they typically see the first mosquitoes test positive in late June/early July. He stresses there are no human cases reported.

The best way to avoid West Nile is to avoid mosquitoes, which means getting rid of standing water and wearing insect repellent. Other advice includes repairing tears in screens and wearing long-sleeved clothing.