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Surveillance Data and Maps


Select a county below to view surveillance information for that county.

Map of Surveillance Results Adams County - Blue/Virus Has Not Yet Been Found Allegheny County - Blue/Virus Has Not Yet Been Found Armstrong County - Blue/Virus Has Not Yet Been Found Beaver County - Blue/Virus Has Not Yet Been Found Bedford County - Blue/Virus Has Not Yet Been Found Berks County - Red/Virus Present Blair County - Blue/Virus Has Not Yet Been Found Bradford County - Blue/Virus Has Not Yet Been Found Bucks County - Blue/Virus Has Not Yet Been Found Butler County - Blue/Virus Has Not Yet Been Found Cambria County - Blue/Virus Has Not Yet Been Found Cameron County - Blue/Virus Has Not Yet Been Found Carbon County - Blue/Virus Has Not Yet Been Found Centre County - Blue/Virus Has Not Yet Been Found Chester County - Blue/Virus Has Not Yet Been Found Clarion County - Blue/Virus Has Not Yet Been Found Clearfield County - Blue/Virus Has Not Yet Been Found Clinton County - Blue/Virus Has Not Yet Been Found Columbia County - Blue/Virus Has Not Yet Been Found Crawford County - Blue/Virus Has Not Yet Been Found Cumberland County - Blue/Virus Has Not Yet Been Found Dauphin County - Blue/Virus Has Not Yet Been Found Delaware County - Blue/Virus Has Not Yet Been Found Elk County - Blue/Virus Has Not Yet Been Found Erie County - Blue/Virus Has Not Yet Been Found Fayette County - Blue/Virus Has Not Yet Been Found Forest County - Blue/Virus Has Not Yet Been Found Franklin County - Blue/Virus Has Not Yet Been Found Fulton County - Blue/Virus Has Not Yet Been Found Greene County - Blue/Virus Has Not Yet Been Found Huntingdon County - Blue/Virus Has Not Yet Been Found Indiana County - Blue/Virus Has Not Yet Been Found Jefferson County - Blue/Virus Has Not Yet Been Found Juniata County - Blue/Virus Has Not Yet Been Found Lackawanna County - Blue/Virus Has Not Yet Been Found Lancaster County - Blue/Virus Has Not Yet Been Found Lawrence County - Blue/Virus Has Not Yet Been Found Lebanon County - Blue/Virus Has Not Yet Been Found Lehigh County - Blue/Virus Has Not Yet Been Found Luzerne County - Blue/Virus Has Not Yet Been Found Lycoming County - Blue/Virus Has Not Yet Been Found McKean County - Blue/Virus Has Not Yet Been Found Mercer County - Blue/Virus Has Not Yet Been Found Mifflin County - Blue/Virus Has Not Yet Been Found Monroe County - Blue/Virus Has Not Yet Been Found Montgomery County - Blue/Virus Has Not Yet Been Found Montour County - Blue/Virus Has Not Yet Been Found Northampton County - Blue/Virus Has Not Yet Been Found Northumberland County - Blue/Virus Has Not Yet Been Found Perry County - Blue/Virus Has Not Yet Been Found Philadelphia County - Blue/Virus Has Not Yet Been Found Pike County - Blue/Virus Has Not Yet Been Found Potter County - Blue/Virus Has Not Yet Been Found Schuylkill County - Red/Virus Present Snyder County - Blue/Virus Has Not Yet Been Found Somerset County - Blue/Virus Has Not Yet Been Found Sullivan County - Blue/Virus Has Not Yet Been Found Susquehanna County - Blue/Virus Has Not Yet Been Found Tioga County - Blue/Virus Has Not Yet Been Found Union County - Blue/Virus Has Not Yet Been Found Venango County - Blue/Virus Has Not Yet Been Found Warren County - Blue/Virus Has Not Yet Been Found Washington County - Blue/Virus Has Not Yet Been Found Wayne County - Blue/Virus Has Not Yet Been Found Westmoreland County - Blue/Virus Has Not Yet Been Found Wyoming County - Blue/Virus Has Not Yet Been Found York County - Blue/Virus Has Not Yet Been Found Counties in Blue are counties in which virus has not yet been found during the year.  Move your cursor over individual counties to determine county surveillance status. Counties in Red are counties in which virus has been found during the year.  Move your cursor over individual counties to determine county surveillance status.

Red/Blue Map Legend - Red = Virus Found, Blue = No Virus Found

Tabular view of PA county surveillance status for 2017

Pennsylvania Surveillance

Surveillance Type Number Collected Number Tested Number Positives
Humans N/A N/A 0*
Human Blood Donors N/A N/A 0
Dead Birds 3 3 0
Mosquito Samples 3664 1024 2
Mosquito Pools N/A 1359 2
Veterinary Samples N/A N/A 0*
*This number may include positive cases for pathogens other than West Nile Virus. For more information, please see the corresponding Human Cases or Veterinary Positives tables below.


View:  County Positives Summary  |  Human Cases  |  Mosquito Positives  |  Avian Positives  |  Veterinary Positives

County Positives Summary

CountyTotal
Positives
Human
Cases
Avian SamplesMosquito SamplesVeterinary
Positives
CollectedTestedPositiveCollectedTestedPositive
Adams000002346700
Allegheny0000040000
Armstrong000000000
Beaver00000841100
Bedford000000000
Berks100001966110
Blair000001416300
Bradford000000000
Bucks000001463500
Butler000000000
Cambria0000058200
Cameron000000000
Carbon00000201000
Centre0011086700
Chester00000622000
Clarion000000000
Clearfield000000000
Clinton000000000
Columbia000000000
Crawford000000000
Cumberland000003406100
Dauphin0000022510800
Delaware001102165400
Elk000000000
Erie00000141100
Fayette0000044000
Forest000000000
Franklin00000885000
Fulton000000000
Greene000009000
Huntingdon000000000
Indiana000000000
Jefferson000000000
Juniata000002000
Lackawanna00000942200
Lancaster000001313600
Lawrence0000062700
Lebanon00000682000
Lehigh00000881600
Luzerne00000773600
Lycoming000000000
McKean000000000
Mercer000000000
Mifflin000002000
Monroe0000042000
Montgomery000001846800
Montour000000000
Northampton00000491500
Northumberland000000000
Perry000006000
Philadelphia000002554300
Pike000000000
Potter000000000
Schuylkill100001192810
Snyder000003000
Somerset000000000
Sullivan000000000
Susquehanna000000000
Tioga001100000
Union000005000
Venango000000000
Warren000000000
Washington0000032900
Wayne000000000
Westmoreland0000012000
Wyoming000000000
York0000043016400
TOTAL203303664102420
Positive Counties2
Counties with
Human Positives
0
Counties with
Dead Bird Positives
0
Counties with
Mosquito Positives
2
Counties with
Veterinary Positives
0

Human Positives Reported
Top

(Most recent cases reported at top of table)

Pathogen County Gender Date Reported
No confirmed human cases have been reported in 2017.

Mosquito Positives Collected
Top

Mosquito samples may consist of 1 or more mosquito pools with 1 or more species. The samples below are ordered by County, then by Recent Date.

County Municipality Date Species
Berks County Mosquito Samples
Berks Reading City 4/18/2017 Culex restuans
Schuylkill County Mosquito Samples
Schuylkill Cressona Boro 4/21/2017 Culex pipiens

Avian Positives Collected
Top

County Municipality Date Collected Species
No positive birds have been reported in 2017.

Veterinary Positives Collected
Top

Pathogen County Municipality Date Collected Animal Type
No positive veterinary specimens have been reported in 2017.

Dead birds

When a dead bird is sighted, the information about that bird is recorded. If the bird meets the criteria for testing, it is collected and sent for testing. Samples are from each bird are tested for WNV. This table records the surveillance effort in Pennsylvania by whole birds,rather than partial tissues from the birds.

Mosquitoes

All mosquitoes collected in one effort create a sample of mosquitoes. This sample is sent to the lab for identification. A sample can include either larval or adult mosquitoes. Only adult mosquitoes are tested for WNV. All mosquitoes are identified, and adults are divided into subsamples by species for testing. This table records the surveillance effort in Pennsylvania by samples, rather than subsamples of mosquitoes.

Veterinary Samples

Diagnostic blood samples from equine and other animals submitted by veterinarians across the state will be tested for WNV. Please note that since it is impossible to differentiate between naturally infected horses and vaccinated horses, it is important that the vaccination history of any horse that is being tested be provided to the laboratory. A reporting form is available for submission with samples from the Pennsylvania Veterinary Laboratory.


A multi-agency cooperative effort between:

PA Department of Environmental Protection Logo PA Department of Health Logo PA Department of Agriculture Logo

Surveillance Results:

  2000  |  2001  |  2002  |  2003  
  2004  |  2005  |  2006  |  2007  
  2008  |  2009  |  2010  |  2011  
  2012  |  2013  |  2014  |  2015  
  2016  |  2017  |