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West Nile Virus Surveillance Program 2011 Surveillance Data Updated 10/05/2011   Go to Current National Data 2000 - 2001 - 2002 - 2003 - 2004 - 2005 - 2006 - 2007 - 2008 - 2009 - 2010 Human Cases Per 100,000 Population 2002-2007 2011 Humans Category Number Maps Clinical Positive Individuals 26 Map Positive Blood Donors 9 Map Cumulative Clinical and Blood Donor Cases 35 NA 2011 Human Clinical Specifics Counties 10 Age Range - 0-13 NA 14-25 3 26-50 11 51-64 9 65+           3 Gender - Male 14 Female 12 Diagnosis - WNV Meningoencephalitis 13 WN Fever 13 WNV Other Neuroninvasive NA - - Hospitalized 15 Deaths 0 2011 Animals   Surveillance Type Number Reported Number Tested Number Positives Maps Dead Birds 99 115 2 Map Mosquito Pools NA 2303 53 Map Equines 1 NA 1 Map Dogs NA NA NA NA   Dead Birds Testing criteria for dead birds in Nebraska are only birds that have been dead less than 24 hours; all species of birds (fledgling age and older) will be accepted for testing; and birds will only be accepted from counties with less than five positive dead birds. Specific date and address information (including county and zip code) is requested for birds that are submitted for testing. Testing criteria for dead birds in Nebraska are only birds that have been dead less than 24 hours; all species of birds (fledgling age and older) will be accepted for testing; and birds will only be accepted from counties with less than five positive dead birds. Specific date and address information (including county and zip code) is requested for birds that are submitted for testing. Mosquitoes Adult mosquitoes are collected every two weeks from routine surveillance sites around the state. Supplemental mosquito trapping may be performed by Health and Human Services System personnel as needed. A mosquito sample is all mosquitoes from one CDC-miniature light trap ran for one night at a single location. Samples are sorted and female (bloodfeeding) mosquitoes are identified to species and counted. Mosquitoes in the genus Culex are pooled in vials containing up to 50 mosquitoes of the same species and are submitted for testing for West Nile virus. Image of a mosquito trap.  Close up image of a mosquito trap.  Image of a New Jersey light trap. Top of Page Documents in PDF format require the use of Adobe Acrobat Reader which can be downloaded for free from Adobe Systems, Inc.