Wednesday, August 8, 2012

West Nile Virus Among Us

McHenry County Department of Health (MCDH) reports two birds – one found in Woodstock, the other in Cary – have tested positive for West Nile virus (WNV). 

As of August 3rd, MCDH has recorded nine positive mosquito batches but no human cases for WNV.  According to the latest report from Illinois Department of Public Health (IDPH), 29 other counties have reported positive bird and mosquito batches and two human cases so far this year.  In McHenry County, one human case of WNV was reported in each of the last two years.

WNV is transmitted through the bite of a mosquito that has picked up the virus by feeding on an infected bird. Illness from West Nile virus is usually mild and includes fever, headache and body aches but serious illnesses, such as encephalitis and meningitis and death, are possible.  Symptoms may last from a few days to a few weeks.  Persons 50 and older have the highest risk of severe disease but everyone is at risk. 

As the hot summer continues, so does mosquito activity and the risk of disease from West Nile virus.  The risk for WNV remains until the first hard frost. The best way to prevent WNV is to reduce the number of mosquitoes around your home and to take personal precautions.
  • Empty standing water from containers around the house; make sure doors and windows have tight-fitting screens
  • Avoid being outdoors when mosquitoes are most active (dusk, dawn); use insect repellent that contains DEET, picaridin, oil of lemon eucalyptus; wear long sleeved shirts and long pants for extra protection.
 For more information on WNV, visit www.mcdh.info (Environmental Health) or call 815-334-4585.

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