"We are seeing a large increase in West Nile virus activity, and
this first human case is a good reminder that we all need to take
precautions," said Dr. LaMar Hasbrouck, director of the Illinois
Department of Public Health. "The mosquitoes that typically carry
West Nile virus, commonly called the house mosquito, are not as
noticeable as the swarms of floodwater mosquitoes we see during
rainy summers. Even if it does not look like there are a lot of
mosquitoes out, house mosquitoes are stealthy biters and their virus
infection rate is increasing rapidly, so make sure to use insect
repellent." A bird collected in Cook County on May 16 and mosquito
batches collected on May 17 and 18 in DuPage and Cook counties were
the first West Nile virus-positive specimens this year. To date,
West Nile virus-positive birds, mosquitoes and one human case have
been reported in 27 counties.
As of July 24
each year |
Counties
positive |
Birds
positive |
Mosquitoes
positive |
2012 |
27 |
21 |
631 |
2011 |
7 |
3 |
49 |
2010 |
15 |
22 |
105 |
2009 |
13 |
4 |
55 |
2008 |
7 |
4 |
73 |
2007 |
5 |
0 |
183 |
2006 |
31 |
58 |
550 |
2005 |
21 |
44 |
376 |
Typically the first human case of West Nile virus is announced in
August each year.
Last year a total of 19 counties in Illinois reported a West Nile
virus-positive mosquito batch, bird or human case. A total of 34
Illinois residents contracted West Nile virus disease and three
died.
West Nile virus is transmitted through the bite of a mosquito
that has picked up the virus by feeding on an infected bird. Common
West Nile virus symptoms include fever, nausea, headache and muscle
aches. Symptoms may last from a few days to a few weeks. However,
four out of five people infected with West Nile virus will not show
any symptoms. In rare cases, severe illness can occur, including
meningitis or encephalitis, or even death. People older than 50 are
at higher risk for severe illness from West Nile virus.
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The best way to prevent West Nile disease or any other
mosquito-borne illness is to reduce the number of mosquitoes around
your home and take personal precautions to avoid mosquito bites.
Precautions include practicing the three "R's" -- reduce, repel and
report.
exposure -- Avoid being outdoors when mosquitoes are most
active, especially between dusk and dawn.
-
Make sure doors
and windows have tight-fitting screens. Repair or replace
screens that have tears or other openings. Try to keep doors and
windows shut, especially at night.
-
Eliminate all
sources of standing water where mosquitoes can breed, including
water in birdbaths, ponds, flowerpots, wading pools, old tires
and any other receptacles.
REPEL -- When
outdoors, wear shoes and socks, long pants and a long-sleeved
shirt, and apply insect repellent that contains DEET, picaridin,
oil of lemon eucalyptus or IR 3535, according to label
instructions. Consult a physician before using repellents on
infants.
REPORT -- In
communities where there are organized mosquito-control programs,
contact your municipal government to report dead birds and areas
of stagnant water in roadside ditches, flooded yards and similar
locations that may produce mosquitoes.
Additional information about West Nile virus is available on the
Illinois Department of Public Health's website at
www.idph.state.il.us/envhealth/wnv.htm. Surveillance numbers are
updated every Wednesday afternoon
www.idph.state.il.us/envhealth/
wnvsurveillance12.htm.
[Text from
Illinois
Department of Public Health file received from
the
Illinois Office of
Communication and Information]
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