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West Nile Virus Activity

Oregon Cases

County Map
Cases by county (pdf)

2014

Number
Positive

Humans 7
Sentinel Chickens 0
Birds 7
Mosquitoes (pools) 58
Horses 3
Squirrel 0
Dogs 0
As of Oct. 29, 2014
U.S. West Nile cases by state - CDC website
 


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

Oregon Health Authority 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.


FAQs

I found a single dead or sick 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.

Contact one of the following Oregon 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 appropriate clinical signs. Refer to West Nile Virus testing 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 Authority, Public Health Department, (971) 673-1111


Oregon West Nile Virus Annual Summary Reports (pdf format)
2014 [pending]

Data from Previous Years - Oregon West Nile Cases 2005 - 2013
County Map
Cases by county (pdf)

2013

Number
Positive
*acquired
out of state

Humans 16*
Sentinel Chickens 0
Birds 2
Mosquitoes (pools)

89

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Horses 6
Squirrel 0
Dogs 0
As of Dec, 2013
U.S. West Nile cases by state
2013
- CDC website

County Map
Cases by county (pdf)

2012

Number
Positive

Humans 12
Sentinel Chickens 0
Birds 2
Mosquitoes (pools) 71
Horses 2
Squirrel 0
Dogs 0
As of Nov. 1, 2012
U.S. West Nile cases by state
2012
- CDC website
  
County Map
Cases by county (pdf)

2011

Number
Positive

Humans 0
Sentinel Chickens 0
Birds 0
Mosquitoes (pools) 3
Horses 2
Squirrel 0
Dogs 0
As of December 30, 2011
U.S. West Nile cases by state
2011
- CDC website
  
County Map
Cases by county (pdf)

2010

Number
Positive

Humans 0
Sentinel Chickens 0
Birds 0
Mosquitoes (pools) 4
Horses 0
Squirrel 0
Dogs 0
As of December 31, 2010
U.S. West Nile cases by state
2010
- CDC website
  
County Map
Cases by county (pdf)

2009

Number
Positive

Humans 12
Sentinel Chickens 0
Birds 16
Mosquitoes (pools) 266
Horses 5
Squirrel 0
Dogs 1
As of December 29, 2009
U.S. West Nile cases by state
2009
- CDC website

County Map
Cases by county (pdf)

2008

Number
Positive

Humans 16
Sentinel Chickens 0
Birds 2
Mosquitoes (pools) 16
Horses 0
Squirrel 0
Dogs 0
As of October 17, 2008
U.S. West Nile cases by state
2008
- CDC website
  
County Map
Cases by county (pdf)

2007

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
  
County Map
Cases by county (pdf)

2006

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
  
Oregon county cases, 2005
Cases by county (pdf)

2005

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