Mosquito-borne Diseases (Arbovirus)
Surveillance, Testing & Data

The Health Department has concluded its testing and surveillance for the 2015 season.

We no longer collect reports of dead birds. 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.

Reviewed: November 5, 2015

About the Maps and Risk Levels:

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West Nile Virus

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

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2015 Mosquito Pool and Veterinary Testing

The Health Department has concluded its 2015 testing and surveillance.

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

Week Ending:
10/24

30
0
0
Year to date
3985
1
97
*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, Brookfield, Burke, Burlington, Cambridge, Castleton, Charlotte, Colchester, Concord, Cornwall, Danby, Derby, Eden, Enosburg, Fair Haven, Fairfax, Ferdinand, Ferrisburgh, Grand Isle, Groton, Hartford, Highgate, Hyde Park, Jay, Killington, Leicester, Londonderry, Lowell, Lunenburg, Manchester, Marshfield, Milton, Montpelier, Morrisville, New Haven, Newbury, Newport City, Pittsford, Pownal, Proctor, Putney, Randolph, Richford, Rockingham, Rutland, Shaftsbury, Shrewsbury, Springfield, St. Albans City, Stowe, Stratton, Sudbury, Sunderland, Sutton, Swanton, Thetford, Vergennes, Vernon, Victory, Weathersfield, Weston, Whiting, Whitingham, and Williston.

Eastern Equine Encephalitis

One mosquito pool tested positive for EEE virus on September 19:

  • One pool collected in Swanton on September 14

West Nile Virus

Seven mosquito pools tested positive for West Nile Virus on October 2:

  • Two pools collected from Burlington on September 25
  • One pool collected from Montpelier on September 25
  • Two pools collected from Vergennes on September 25
  • One pool collected from Whiting on September 28
  • One pool collected from St. Albans City on September 29

Five mosquito pools tested positive for West Nile virus on September 25:

  • One pool collected from Brandon on September 22
  • One pool collected from Rutland on September 22
  • Three pools collected from St. Albans City on September 22

Six mosquito pools tested positive for West Nile virus on September 24:

  • One pool collected from Vergennes on September 18
  • Two pools collected from Burlington on September 18
  • Two pools collected from Montpelier on September 18
  • One pool collected from Brattleboro on September 16

12 mosquito pools tested positive for West Nile virus on September 19:

  • One pool collected from Vergennes on September 11
  • One pool collected from Burlington on September 11
  • Four pools collected from Montpelier on September 11
  • One pool collected from Brattleboro on September 9
  • One pool collected from Rockingham on September 8
  • One pool collected from Springfield on September 9
  • Three pools collected from St. Albans City on September 15

10 mosquito pools tested positive for West Nile virus on September 17.

  • One pool collected from Vernon on September. 2
  • Two pools collected from Bennington on September. 4
  • One pool collected from Barton on September. 8
  • Four pools collected from St. Albans City on September. 9
  • One pool collected from Cambridge on September. 10
  • One pool collected from Charlotte on September 11

16 mosquito pools tested positive for West Nile virus on September 14.

  • Six pools collected from Vergennes on Sept. 4
  • Seven pools collected from Burlington on Sept 4
    • Two pools collected from Derby on Sept 8
    • One pool collected from Hartford on Sept 8

Six mosquito pools tested positive for West Nile virus on September 8:

  • One pool collected from Whiting on September 1
  • One pool collected from Derby on September 1
  • One pool collected from St. Albans City on September 1
  • Two pools collected from Newport City on September 2
  • One pool collected from Hartford on September 2

14 mosquito pools tested positive for West Nile virus on September 3:

  • Two pools collected from Newport City on August 25
  • Three pools collected from Springfield on August 26
  • One pool collected from Rutland on August 27
  • Three pools collected from Stowe on August 27
  • Two pools collected from Vergennes on August 29
  • Three pools collected from Burlington on August 29

Two mosquito pools tested positive for West Nile virus on August 28:

  • Two pools collected from St. Albans City on August 25

Five mosquito pools tested positive for West Nile virus on August 27:

  • Five pools collected from Vergennes on August 20

Two mosquito pools tested positive for West Nile virus on August 25:

  • Two pools collected from St. Albans City on August 18

Six mosquito pools tested positive for West Nile virus on August 21:

  • Two pools collected from Rutland on August 11
  • Two pools collected from Springfield on August 12
  • One pool collected from Vergennes on August 13
  • One pool collected from Brandon on August 13

Two mosquito pools tested positive for West Nile virus on August 6:

  • One pool collected from Montpelier on July 31
  • One pool collected from Putney on July 29

One mosquito pool tested positive for West Nile virus on August 4:

  • One pool collected from Hartford on July 30

Three mosquito pools tested positive for West Nile virus on July 30:

  • Three pools collected from Springfield on July 22

 

Veterinary Sample Testing
 
Samples Tested
EEE Positive Samples
WNV Positive Samples

Week ending:
10/24

0
0
0
Year to date
3
0
0

 Data reviewed: November 5, 2015

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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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