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Department of Human Services

Diseases A-Z

 

West Nile virus

Activity


West Nile virus
   WNV info
   WNV activity
   WNV press releases
   WNV testing and reporting
   WNV prevention and education
   Local mosquito control agencies (PDF)


 

West Nile virus, Oregon 2007

See our "live" map.

County Map
Cases by county
[pdf]
Number
Positive
Humans 27
Sentinel Chickens 11
Corvids 52
Sage Grouse 0
Mosquitoes (pools) 32
Horses 16
Squirrel 1
Dogs 2

As of  November 9, 2007

U.S. West Nile cases by state, 2007
[CDC website]

West Nile Virus, Oregon 2006

County Map
Cases by county
[pdf]
Number
Positive
Humans 73
Sentinel Chickens 0
Birds 25
Mosquitoes 1100
Horses 35
As of November 21, 2006
U.S. West Nile cases by state, 2006
[CDC website]
West Nile Virus, Oregon 2005
Oregon county cases, 2005
Cases by county
[pdf]
Number
Positive
Humans 8
Sentinel Chickens 17
Birds (Corvids) 15
Mosquitoes (pools) 11
Horses 46
As of October 14, 2005
U.S. West Nile cases by state, 2005
[CDC website]

 


With mosquito control agencies and local county health departments around the state, Oregon Health Services is testing adult mosquitoes and birds for mosquito-borne encephalitis.

 

Oregon Health Services has stepped up its surveillance of mosquito-borne encephalitis. We are encouraging physicians, veterinarians, diagnostic laboratories and other health care providers to assist in this effort.

I found a single dead or ill bird — what do I do?
Birds are a natural host for West Nile virus; in Oregon particularly crows, ravens, jays, magpies, and sage grouse. A large or continuous die-off of birds may be a local indicator of WNV activity. Call one of the following agencies for collection and testing for West Nile virus surveillance. I suspect I have a horse with WNV infection — what do I do?
Veterinarians are required to report horses with the apppropriate clinical signs. Refer to the WNV testing page for further information and contact the Oregon Dept. of Agriculture at 503-986-4760 before submitting horse samples.

Are other animals tested for WNV?
Any other animal suspected of having West Nile virus or other viruses carried by mosquitoes will be tested at a laboratory. If you have any questions, please call the state public health epidemiologist on call at Oregon Health Services, 971-673-1111.



 
Page updated: May 08, 2008

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