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West Nile Virus Surveillance Program 2008 Surveillance Data Updated 10/23/2008 Go to Current National Data 2000 - 2001 - 2002 - 2003 - 2004 - 2005 - 2006 - 2007 - 2008 Human Cases Per 100,000 Population 2002-2007 2008 Humans Category Number Maps Clinical Positive Individuals 45 Map Positive Blood Donors 7 NA Total Positives 52 NA 2008 Human Clinical Specifics Counties 30 Age Range - 1-13 4 14-25 5 26-50 18 51-64 10 65+ 8 Gender - Male 26 Female 19 Diagnosis - Meningitis 4 Encephalitis 1 WN Fever 40 - - Hospitalized 9 Deaths 0 2008 Animals Surveillance Type Number Reported Number Tested Number Positives Maps/Reports Dead Birds 308 67 17 Map NA Mosquito Pools NA 1592 81 Map NA Equines NA NA 2 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; crows, blue jays, and magpies 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.