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West Nile Virus Activity

Oregon Cases


Cases by county

2015

Number
Positive

Humans 0
Sentinel Chickens 0
Birds 3
Mosquitoes (pools) 26
Horses 1
Squirrel 0
Dogs 0
As of Aug 20, 2015
U.S. West Nile cases by state - CDC website


Regional Cases

Pacific NW Region
Cases in Pacific NW
As of Aug 6, 2015
 


With mosquito control agencies and local county health departments around the state, Oregon Health Authority tests adult mosquitoes and birds for mosquito-borne encephalitis. Health care providers, veterinarians and diagnostic laboratories take part in surveillance efforts.


If you find a sick or dead bird:

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:

If you suspect a horse has WNV infection:

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.

Other animals and 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 Division, (971) 673-1111.


Oregon WNV Annual Summary Reports (pdf format)
2014

2013

 |  2012

2011

2010

2009

|   2008

|   2007

|   2006

|    2005

|   2004


Data from Previous Years - Oregon WNW Cases 2005 - 2014
County Map
Cases by county (pdf)

2014

Number
Positive

Humans 8
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 
2014
- CDC Website

  
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 30, 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