Mosquito-borne Diseases (Arbovirus)
Surveillance & Data

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

Eastern Equine Encephalitis (EEE)

Risk Assessment Maps and Information
These maps provide an estimate of the areas in Vermont that are at increased risk for Eastern equine encephalitis activity in 2014. Eastern Equine Encephalitis (EEE) Estimated Risk Map

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 29, 2014

More Information about the Risk Map and Risk Levels:

Positive EEE Test Results

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West Nile Virus

Positive WNV Test Results
**Note: 2002-2012 test results are listed by county

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2014 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 were collected: Alburg, Benson, Brandon, Brattleboro, Brookfield, Castleton, Colchester, Cornwall, Danby, Danville, Dummerston, East Montpelier, Eden, Elmore, Fair Haven, Fairfax, Grand Isle, Hartford, Highgate, Hyde Park, Jericho, Leicester, Lowell, Lyndon, Marshfield, Milton, Morrisville, New Haven, Newbury, Newport City, Orwell, Pittsford, Proctor, Putney, Randolph, Rockingham, Rutland, Sheldon, Springfield, St. Albans City, Stowe, Sudbury, Sutton, Swanton, Vernon, Wallingford, Weathersfield, West Haven, West Windsor, Westminster, Whiting, Williston, Woodbury, and Woodstock.

Eastern Equine Encephalitis:

  • One mosquito pool collected on June 17 from Grand Isle tested positive for EEE on June 26.
  • Two mosquito pools collected on August 19 from Whiting tested positive for EEE on August 22

West Nile Virus:

  • One mosquito pool collected on July 29 from St. Albans City tested positive for WNV on August 8.
  • One mosquito pool collected on August 21 from Putney tested positive for WNV on August 26.
  • Five mosquito pools tested positive for WNV on August 28. Three of the pools were collected in Rockingham on August 21. One was collected from Brattleboro on August 21. And the other WNV positive pool was collected from Newbury on August 18.


Veterinary Sample Testing
Samples Tested
EEE Positive Samples
WNV Positive Samples

Week ending:

Year to date

 Data reviewed:  August 29, 2014

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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.

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National Data and Resources

West Nile Virus

Eastern Equine Encephalitis

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