Blue Jay Tests Positive For West Nile Virus In McHenry County

MCHENRY COUNTY, IL — The blue jay collected from a location in Johnsburg has tested positive for West Nile virus, according to local public health officials.

The sample was taken on July 18.

The McHenry County Department of Health collects a limited number of birds for testing each mosquito season, and all other bird samples have been negative.

West Nile virus can be transmitted to birds through the bite of an infected mosquito, heath officials said. Also, infected birds can become carriers of the virus by passing the virus to mosquitos that bite them.

In Illinois, West Nile virus be transmitted to humans through the bite of an infected Culex species mosquito. Illness from the virus is usually mild and includes fever, headache and body aches but serious illnesses, such as encephalitis and meningitis and death, are possible.

Individuals 60 years of age or older or with serious underlying health conditions are at higher risk for developing severe symptoms. There is no vaccine available for West Nile virus and residents should contact their health care provider if you develop any warning signs.

Residents are also encouraged to take steps to protect themselves from mosquito-borne illnesses by making sure you empty standing water from containers around the house and to make sure doors and windows have tight-fitting screens.

Other tips include wearing protective clothing such long-sleeved shirts, socks and pants when outdoors, and limit outdoor activities during the evening and early morning, which is when Culex mosquitoes are most active.

You should also use insect repellents approved by the EPA:

• Repellents containing 20% or more DEET (less for children) are effective.
• Repellents including oil of lemon eucalyptus, Picaridin or IR3535 may be used as an alternative to DEET.
• Apply repellents per label directions. Consult with a doctor before using any repellant on infants.

From May through October, health department staff conducts West Nile virus surveillance throughout the county. Mosquito batch collections and testing are conducted weekly.

In addition, MCDH tests a limited number of dead birds. You can contact the Division of Environmental Health at 815-334-4585 if you find a dead blue jay, crow or robin.

Bird specimens must be in good condition in order to be tested, with no signs of insects or obvious injury or decay. Avoid bare-hand contact when handling any dead animal, although there is no evidence WNV infection occurs this way.

For more than 50 years, the McHenry County Department of Health has worked to prevent disease and promote health. The health department can be reached by calling 815-334-4510 or visiting www.mcdh.info.