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West Nile Virus

West Nile Virus was first isolated from a patient in the West Nile district of Uganda in 1937. Several outbreaks of WNV occurred in the Mediterranean Basin (an area stretching from Portugal to Jordan and Italy to Cape Verde) in the 1950s and 1960s. The United States' first WNV cases occurred in New York in 1999. North Dakota's first case occurred in August, 2002.

Current Data

wnv map july 29 

2015 West Nile Virus Samples and Testing
Beginning: Monday, June 01, 2015
Through: Wednesday, July 29, 2015
 Tested To Date*Positive to Date* †Nation-wide Positive°
Humans138
Horses700
Dead Birds600
Mosquito Pools030
Other Veterinary000

* Results may change pending further investigation
† Confirmed and Probable Cases
° Reported to CDC

   
2015 WNV Human Summary
Total CasesAge Information
RangeCases
Gender<100
Female110-190
Male020-290
30-390
Hospitalized040-491
50-590
Active Counties   1  60 and over0

  Click here for data by county