Mosquito-borne Diseases (Arbovirus)
Surveillance & Data

The Vermont Department of Health no longer takes dead bird reports.
If you see a dead bird, you can bury it, or double bag it and put in the trash. Always wear gloves when handling dead animals.

Eastern Equine Encephalitis (EEE)

EEE Testing and Results
Risk Assessment Maps

Eastern Equine Encephalitis (EEE) Estimated Risk MapThese maps provide an estimate of the areas in Vermont that are at increased risk for Eastern equine encephalitis activity in 2015.

The maps are regularly reviewed and updated if the results of mosquito surveillance indicate a change in the area or the level of risk.

Maps reviewed: August 4, 2015

About the Maps and Risk Levels:

Return to Top

West Nile Virus

West Nile Virus Testing and Results
**Note: 2002-2012 test results are listed by county

Return to Top

2015 Mosquito Pool and Veterinary Testing

Mosquito Pool Surveillance and Testing
Pools Tested*
EEE Positive Pools
WNV Positive Pools

Week Ending:

Year to date
*Pool = up to 50 mosquitoes of the same species, trapped at the same site, on the same date.

Towns where mosquitoes have been collected: Addison, Alburg, Barton, Bennington, Benson, Berkshire, Brandon, Brattleboro, Brighton, Burke, Burlington, Cambridge, Castleton, Charlotte, Colchester, Concord, Cornwall, Danby, Derby, Eden, Enosburg, Fair Haven, Fairfax, Ferdinand, Ferrisburgh, Grand Isle, Hartford, Highgate, Hyde Park, Jay, Killington, Leicester, Londonderry, Lowell, Lunenburg, Manchester, Marshfield, Milton, Montpelier, Morrisville, New Haven, Newbury, Newport City, Pittsford, Pownal, Proctor, Putney, Richford, Rockingham, Rutland, Shaftsbury, Springfield, St. Albans City, Stowe, Stratton, Sudbury, Sunderland, Sutton, Swanton, Thetford, Vergennes, Vernon, Victory, Weathersfield, Whiting, Whitingham, and Williston.

One mosquito pool collected from Hartford on July 30th, tested positive for WNV on August 4th. The pool contained Culex restauns/pipiens mosquitoes.

Three mosquito pools collected from Springfield on July 22nd tested positive for West Nile virus on July 30th. Two of the pools contained Culex restauns/pipiens mosquitoes. The other pool contained Ochlerotatus japonicus mosquitoes.

Eastern Equine Encephalitis:

  • N/A

West Nile Virus:

  • Three mosquito pools collected from Springfield on July 22 tested positive for West Nile virus on July 30.


Veterinary Sample Testing
Samples Tested
EEE Positive Samples
WNV Positive Samples

Week ending:

Year to date

 Data reviewed:  August 4, 2015

Return to Top

Vermont Arbovirus Surveillance and Response Plan

The goal of the State of Vermont Arbovirus Surveillance and Response Plan is to protect the public’s health from an outbreak of West Nile virus or Eastern equine encephalitis (EEE) virus. Information gathered from surveillance activities will inform local policy makers about the level of virus activity and the potential threat to human health. This plan allows the state and local government the flexibility to respond to local situations.

This update of the plan includes additional information about responding to EEE virus, which was the cause of human illness for the first time in Vermont in 2012.

Return to Top