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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 - Red/Virus Present Armstrong County - Blue/Virus Has Not Yet Been Found Beaver County - Red/Virus Present 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 - Red/Virus Present 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 - Red/Virus Present Chester County - Red/Virus Present 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 - Red/Virus Present Dauphin County - Blue/Virus Has Not Yet Been Found Delaware County - Red/Virus Present 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 - Red/Virus Present 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 - Red/Virus Present Lancaster County - Blue/Virus Has Not Yet Been Found Lawrence County - Red/Virus Present 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 - Red/Virus Present 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 8 8 0
Mosquito Samples 11213 3508 19
Mosquito Pools N/A 5155 20
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
Adams0000063015600
Allegheny100002164810
Armstrong000000000
Beaver100002647710
Bedford000000000
Berks1000067520410
Blair0000030712600
Bradford000000000
Bucks1000052219110
Butler000000000
Cambria000002403700
Cameron000000000
Carbon00000271500
Centre102202265410
Chester1000037912510
Clarion000000000
Clearfield000007000
Clinton000000000
Columbia00000802100
Crawford000000000
Cumberland2000078713520
Dauphin0000039614900
Delaware1022071431810
Elk000000000
Erie000001105100
Fayette000001421400
Forest000000000
Franklin1000037010910
Fulton000000000
Greene000001162300
Huntingdon000000000
Indiana000000000
Jefferson000000000
Juniata000002000
Lackawanna100002158610
Lancaster0011041710300
Lawrence300002426330
Lebanon000002466400
Lehigh000002159800
Luzerne0000019912400
Lycoming000001605500
McKean000006000
Mercer000000000
Mifflin000002000
Monroe002201383100
Montgomery0000047316600
Montour0000027500
Northampton000001585100
Northumberland000001352100
Perry000006000
Philadelphia0000072620600
Pike000000000
Potter000000000
Schuylkill100002537710
Snyder0000033200
Somerset000000000
Sullivan000000000
Susquehanna000000000
Tioga001100000
Union00000652100
Venango000000000
Warren000000000
Washington000001322500
Wayne000000000
Westmoreland000001664800
Wyoming000000000
York4000098940940
TOTAL190880112133508190
Positive Counties13
Counties with
Human Positives
0
Counties with
Dead Bird Positives
0
Counties with
Mosquito Positives
13
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
Allegheny County Mosquito Samples
Allegheny Wilkinsburg Boro 6/22/2017 Culex pipiens
Beaver County Mosquito Samples
Beaver Brighton Twp 6/14/2017 Culex pipiens-restuans
Berks County Mosquito Samples
Berks Reading City 4/18/2017 Culex restuans
Bucks County Mosquito Samples
Bucks Newtown Twp 6/14/2017 Culex restuans
Centre County Mosquito Samples
Centre Harris Twp 5/23/2017 Culex restuans
Chester County Mosquito Samples
Chester East Goshen Twp 5/25/2017 Culex pipiens-restuans
Cumberland County Mosquito Samples
Cumberland Lemoyne Boro 6/20/2017 Culex pipiens
Cumberland East Pennsboro Twp 6/6/2017 Culex restuans
Delaware County Mosquito Samples
Delaware Darby Twp 6/13/2017 Culex pipiens
Franklin County Mosquito Samples
Franklin Hamilton Twp 6/14/2017 Culex restuans
Lackawanna County Mosquito Samples
Lackawanna Scranton City 6/6/2017 Culex restuans
Lawrence County Mosquito Samples
Lawrence Mahoning Twp 6/13/2017 Culex pipiens-restuans
Lawrence Pulaski Twp 6/5/2017 Culex pipiens-restuans
Lawrence Mahoning Twp 6/5/2017 Culex pipiens-restuans
Schuylkill County Mosquito Samples
Schuylkill Cressona Boro 4/21/2017 Culex pipiens
York County Mosquito Samples
York Lower Windsor Twp 6/22/2017 Culex restuans
York Manchester Twp 6/14/2017 Culex restuans
York Manchester Twp 6/7/2017 Culex restuans
York Lower Windsor Twp 5/18/2017 Culex restuans

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  |