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West Nile Virus discovered in Knox County

Trapping and testing of mosquitoes in Knox County has resulted in the positive
identification of West Nile Virus (WNV) in three different locations. Late Monday,
the Knox County Health Department received notification of the positive results
from the Ohio Department of Health (ODH) which had placed the mosquito traps
at the end of July
The positive samples were collected in Fredericktown, Gambier and the Apple
Valley area of Howard.
Knox County joins 19 other Ohio counties with positive WNV activity including
neighboring Richland and Licking counties. As of Monday, ODH and local health
departments have placed traps in 43 counties this summer, collecting nearly 8,000
samples of which over 200,000 mosquitoes were tested. Despite the positive
collections, there have been no reports of West Nile Virus in humans
Nate Overholt, environmental health director with the Knox County Health
Department said the agency “will conduct pesticide spraying in the areas where the
positive mosquitoes were trapped.” The environmental health staff will also treat
areas of standing water with larvacide to help reduce the mosquito population.
“The entire state is seeing an earlier onset of mosquitos infected with West Nile
Virus than in years past,” said Overholt. Statewide, positive cases were on the rise
early in July. Last year, an increase in positive cases did not happen until mid-
August. The last positive collection of infected mosquitoes in Knox County was in
late August 2015.

– MORE –

News Release
For more information, contact Pam Palm,
740-507-6533 or ppalm @knoxhealth.com 11660 Upper Gilchrist Rd. Mount Vernon, OH 43050
PH 740-392- 2200 Fax 740-392-9613
www.knoxhealth.com

Page 2 – Three locations in Knox County test positive for West Nile Virus

WNV is spread to humans from the bite of an infected mosquito, which gets the
virus from biting an infected bird. The virus can cause an infection in humans that
can lead to encephalitis. Many types of birds can be infected, but crows and blue
jays are most likely to die from the disease. Horses are also prone to WNV.
Most people who become infected with WNV do not have any symptoms. About
one in five people who become infected develop a fever with other symptoms such
as headache, body aches, joint pains, vomiting, diarrhea, or rash. Less than 1
percent of infected people develop a serious neurologic illness, such as encephalitis
or meningitis (inflammation of the brain or surrounding tissues).
There is no specific treatment for WNV infection, and care is based on symptoms.
Overholt urged local residents to take personal measures to protect themselves
from mosquitoes. Those measures include using insect repellent containing DEET
and empting water-holding containers such as plant saucers, outdoor toys, old tires
and other items around your home. Mosquitoes need just a small amount of water
to lay their eggs which hatch in just a day or two.
“Mosquitoes are likely to be biting between dusk and dawn,” said Overholt. “If
you must be outdoors when mosquitoes are active, cover up by wearing shoes,
socks, long pants and long-sleeved shirts. Also, wear, light colors. They are less
attractive to mosquitoes.”

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