Prevent, Promote, and Protect your Health with the Lake County General Health District
(440) 350-2543
5966 Heisley Rd
Mentor, Ohio 44060
July 17, 2018

July 17, 2018

NEWS RELEASE                                                                                     CONTACT: Bert Mechenbier, (440) 350-2453
July 17, 2018                                                                                          LAKE COUNTY GENERAL HEALTH DISTRICT


The Ohio Department of Health (ODH) has confirmed one positive mosquito pool for West Nile Virus (WNV) in Lake County.  A “pool” is a collection of no more than 50 mosquitoes. Although this particular positive pool was collected at a Madison trap site on June 26, 2018, it is likely that positive WNV mosquitoes are present throughout the county.

Identifying a positive pool is confirmation that the WNV threat is present and will likely increase for the rest of the summer.  Positive WNV mosquitoes have also been reported in 14 Ohio counties this season. To date, there have been no human cases of WNV reported in Ohio.

Approximately 80 percent of people who are infected with WNV will not show any symptoms, but there is no way to know in advance if you will develop an illness or not.  Those who do develop symptoms usually do so between two and 14 days after they are bitten by the infected mosquito.

Up to 20 percent of people who become infected will have symptoms that can last for a few days to as long as several weeks. Symptoms can include:

  • Fever
  • Headache
  • Body aches
  • Nausea
  • Vomiting
  • Swollen lymph glands
  • Rash on chest, stomach or back

About one in 150 people infected with WNV will develop severe illness.  The severe symptoms may last several weeks and neurologic effects may be permanent.  Symptoms of severe illness can include:

  • High fever
  • Headache
  • Neck stiffness
  • Stupor
  • Disorientation
  • Coma
  • Tremors
  • Convulsions
  • Muscle weakness
  • Vision loss
  • Numbness
  • Paralysis


Death from infection with WNV is 10 percent for those diagnosed with severe illness, but is much higher for patients diagnosed with WNV encephalitis and acute flaccid paralysis.

The Lake County General Health District Mosquito Control program is a locally funded program to protect our residents from mosquito borne disease. The mosquito control program tracks the mosquito population, monitors disease levels in the mosquitoes, applies larvicides, and conducts nighttime adulticiding. The mosquito population is monitored through the use of specialized traps placed throughout the county and calls from the public. The trapped mosquitoes are counted and sent to ODH for WNV testing. The Mosquito Program employs two full-time crews that inspect areas of standing water for mosquito larva and, if needed, treat the area to kill the larva. The adulticide program consists of spraying areas of the county in the evening when the mosquitoes are active. Information about the spray routes and schedule are available at: or by calling 440-350-2088.

Please call the LCGHD at (440) 350-2543 with questions concerning mosquito control or WNV.  Additional WNV and mosquito information can be found at:

Ohio Dept. of Health:




Marianne Rusnak
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