This page, Massachusetts Arbovirus Results Summary, is offered by

Massachusetts Arbovirus Results Summary

Real-time results for EEE and WNV. Residents should take personal preventative actions like using repellents and avoiding peak mosquito activity.

MDPH has identified five EEE human cases in 2020, residents of Bristol, Hampden, Norfolk and Plymouth Counties. EEE positive mosquito samples have been detected in Franklin, Middlesex, Norfolk, Plymouth, and Worcester Counties, Risk levels have been increased in these regions. Please check back throughout the season to view risk levels and findings of EEE and WNV.

Table of Contents

Human detection of EEE/WNV

County name Age Onset Virus Result Presentation
Plymouth <19 7/20/2020 EEE Meningoencephalitis
Middlesex 50 - 59 8/02/2020 WNV Fever
Hampden 60 - 69 8/01/2020 EEE Meningoencephalitis
Plymouth 90 - 99 8/14/2020 EEE Meningoencephalitis
Middlesex 80 - 89 8/24/2020 WNV Meningoencephalitis
Middlesex 50 - 59 8/12/2020 WNV Encephalitis
Norfolk 60 - 69 8/28/2020 EEE Meningoencephalitis
Middlesex 60 - 69 8/23/2020 WNV Fever
Middlesex 40 - 49 8/21/2020 WNV Fever
Middlesex 80 - 89 8/01/2020 WNV Encephalitis
Bristol <19 8/19/2020 WNV Meningoencephalitis
Bristol 60 - 69 9/10/2020 EEE Meningitis
Middlesex 40 - 49 9/09/2020 WNV Fever

Animal detection of EEE/WNV

County name Age Onset Virus Result Species
         

Mosquito detection of EEE/WNV

County     City Date Collected Species Agents
Franklin     Orange 7/01/2020 Coquillettidia perturbans EEE
Franklin     Wendell 7/05/2020 Coquillettidia perturbans EEE
Middlesex     Belmont 7/07/2020 Culex pipiens / restuans complex WNV
Middlesex     Belmont 7/07/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 7/09/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 7/09/2020 Culex pipiens / restuans complex WNV
Plymouth     Carver 7/13/2020 Coquillettidia perturbans EEE
Plymouth     Carver 7/13/2020 Coquillettidia perturbans EEE
Plymouth     Carver 7/13/2020 Coquillettidia perturbans EEE
Plymouth     Carver 7/13/2020 Coquillettidia perturbans EEE
Plymouth     Carver 7/13/2020 Coquillettidia perturbans EEE
Middlesex     Medford 7/14/2020 Culex pipiens / restuans complex WNV
Middlesex     Newton 7/21/2020 Culex pipiens / restuans complex WNV
Middlesex     Newton 7/21/2020 Culex pipiens / restuans complex WNV
Middlesex     Newton 7/21/2020 Culex pipiens / restuans complex WNV
Middlesex     Newton 7/21/2020 Culex pipiens / restuans complex WNV
Middlesex     Newton 7/21/2020 Culex pipiens / restuans complex WNV
Middlesex     Newton 7/21/2020 Culex pipiens / restuans complex WNV
Norfolk     Brookline 7/21/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 7/21/2020 Culex pipiens WNV
Plymouth     Middleborough 7/21/2020 Coquillettidia perturbans EEE
Plymouth     Middleborough 7/21/2020 Coquillettidia perturbans EEE
Plymouth     Middleborough 7/21/2020 Culiseta melanura EEE
Plymouth     Middleborough 7/21/2020 Culiseta melanura EEE
Plymouth     Carver 7/27/2020 Coquillettidia perturbans EEE
Plymouth     Carver 7/27/2020 Coquillettidia perturbans EEE
Plymouth     Carver 7/27/2020 Coquillettidia perturbans EEE
Plymouth     Carver 7/27/2020 Coquillettidia perturbans EEE
Plymouth     Carver 7/27/2020 Culiseta melanura EEE
Middlesex     Arlington 7/28/2020 Culex pipiens / restuans complex WNV
Middlesex     Arlington 7/28/2020 Culex pipiens / restuans complex WNV
Middlesex     Watertown 7/28/2020 Culex pipiens / restuans complex WNV
Middlesex     Watertown 7/28/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 7/28/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 7/28/2020 Culex pipiens / restuans complex WNV
Middlesex     Pepperell 7/29/2020 Coquillettidia perturbans EEE
Plymouth     Middleborough 7/28/2020 Culiseta melanura EEE
Plymouth     Plympton 7/31/2020 Culiseta melanura EEE
Plymouth     Plympton 7/31/2020 Culiseta melanura EEE
Plymouth     Plympton 7/31/2020 Culiseta melanura EEE
Plymouth     Plympton 7/31/2020 Culiseta melanura EEE
Plymouth     Plympton 7/31/2020 Coquillettidia perturbans EEE
Plymouth     Plympton 7/31/2020 Coquillettidia perturbans EEE
Plymouth     Plympton 7/31/2020 Coquillettidia perturbans EEE
Plymouth     Kingston 7/31/2020 Coquillettidia perturbans EEE
Plymouth     Kingston 7/31/2020 Culiseta melanura EEE
Plymouth     Carver 7/31/2020 Coquillettidia perturbans EEE
Plymouth     Carver 7/31/2020 Coquillettidia perturbans EEE
Plymouth     Middleborough 7/31/2020 Coquillettidia perturbans EEE
Bristol     Attleboro 7/31/2020 Culex pipiens / restuans complex WNV
Norfolk     Needham 7/29/2020 Culex pipiens / restuans complex WNV
Plymouth     Carver 8/03/2020 Coquillettidia perturbans EEE
Plymouth     Carver 8/03/2020 Coquillettidia perturbans EEE
Plymouth     Carver 8/03/2020 Coquillettidia perturbans EEE
Plymouth     Carver 8/03/2020 Coquillettidia perturbans EEE
Plymouth     Carver 8/03/2020 Coquillettidia perturbans EEE
Plymouth     Carver 8/03/2020 Coquillettidia perturbans EEE
Plymouth     Carver 8/03/2020 Coquillettidia perturbans EEE
Plymouth     Wareham 8/03/2020 Coquillettidia perturbans EEE
Plymouth     Wareham 8/03/2020 Aedes vexans EEE
Norfolk     Canton 8/03/2020 Coquillettidia perturbans EEE
Suffolk     Boston 8/04/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 8/04/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 8/04/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 8/04/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 8/04/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 8/04/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 8/04/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 8/04/2020 Culex pipiens / restuans complex WNV
Plymouth     Hanson 8/04/2020 Coquillettidia perturbans EEE
Plymouth     Bridgewater 8/07/2020 Coquillettidia perturbans EEE
Plymouth     Bridgewater 8/07/2020 Coquillettidia perturbans EEE
Plymouth     Bridgewater 8/07/2020 Coquillettidia perturbans EEE
Plymouth     Bridgewater 8/07/2020 Coquillettidia perturbans EEE
Plymouth     Bridgewater 8/07/2020 Culiseta melanura EEE
Plymouth     Plympton 8/07/2020 Culiseta melanura WNV
Plymouth     Plympton 8/07/2020 Coquillettidia perturbans WNV
Bristol     Somerset 8/06/2020 Culex pipiens / restuans complex WNV
Bristol     Somerset 8/06/2020 Culex pipiens / restuans complex WNV
Norfolk     Westwood 8/04/2020 Culex pipiens / restuans complex WNV
Norfolk     Westwood 8/04/2020 Culex pipiens / restuans complex WNV
Norfolk     Quincy 8/04/2020 Culex pipiens / restuans complex WNV
Plymouth
    Halifax 8/10/2020 Culiseta melanura WNV
Plymouth
    Middleborough 8/10/2020 Culiseta melanura EEE
Plymouth
    Middleborough 8/10/2020 Culiseta melanura EEE
Plymouth
    Middleborough 8/10/2020 Coquillettidia perturbans EEE
Plymouth
    Middleborough 8/10/2020 Coquillettidia perturbans EEE
Plymouth
    Middleborough 8/10/2020 Culex salinarius EEE
Plymouth     Middleborough 8/10/2020 Culex salinarius EEE
Plymouth     Middleborough 8/10/2020 Culex salinarius EEE
Middlesex     Everett 8/11/2020 Culex pipiens / restuans complex WNV
Middlesex     Everett 8/11/2020 Culex pipiens / restuans complex WNV
Middlesex     Malden 8/11/2020 Culex pipiens / restuans complex WNV
Middlesex     Malden 8/11/2020 Culex pipiens / restuans complex WNV
Middlesex     Malden 8/11/2020 Culex pipiens / restuans complex WNV
Middlesex     Malden 8/11/2020 Culex pipiens / restuans complex WNV
Middlesex     Malden 8/11/2020 Culex pipiens / restuans complex WNV
Middlesex     Malden 8/11/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 8/11/2020 Culex pipiens / restuans complex WNV
Worcester     Dougas 8/11/2020 Coquillettidia perturbans EEE
Middlesex     Wakefield 8/11/2020 Culex pipiens / restuans complex WNV
Plymouth     Middleborough 8/09/2020 Culiseta melanura EEE
Plymouth     Middleborough 8/09/2020 Culiseta melanura EEE
Plymouth     Middleborough 8/09/2020 Culiseta melanura EEE
Plymouth     Middleborough 8/09/2020 Culiseta melanura EEE
Plymouth     Middleborough 8/09/2020 Culiseta melanura EEE
Plymouth     Middleborough 8/09/2020 Culiseta melanura EEE
Plymouth     Middleborough 8/09/2020 Coquillettidia perturbans EEE
Plymouth     Middleborough 8/09/2020 Coquillettidia perturbans EEE
Plymouth     Middleborough 8/09/2020 Coquillettidia perturbans EEE
Plymouth     Middleborough 8/09/2020 Coquillettidia perturbans EEE
Plymouth     Middleborough 8/09/2020 Coquillettidia perturbans EEE
Bristol     Norton 8/12/2020 Culex pipiens / restuans complex WNV
Bristol     Somerset 8/13/2020 Culex pipiens / restuans complex WNV
Bristol     Attleboro 8/14/2020 Culex pipiens / restuans complex WNV
Bristol     Attleboro 8/14/2020 Culex pipiens / restuans complex WNV
Norfolk     Needham 8/11/2020 Coquillettidia perturbans WNV
Norfolk     Needham 8/11/2020 Culex salinarius WNV
Norfolk     Westwood 8/11/2020 Culex salinarius WNV
Norfolk     Westwood 8/11/2020 Coquillettidia perturbans WNV
Norfolk     Weymouth 8/12/2020 Culex pipiens / restuans complex WNV
Norfolk     Quincy 8/12/2020 Culex pipiens / restuans complex WNV
Norfolk     Quincy 8/12/2020 Culex pipiens / restuans complex WNV
Norfolk     Quincy 8/12/2020 Culex salinarius WNV
Suffolk     Boston 8/18/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 8/18/2020 Culex pipiens / restuans complex WNV
Norfolk     Wellesley 8/18/2020 Culex pipiens / restuans complex WNV
Suffolk     Revere 8/17/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 8/18/2020 Culex pipiens / restuans complex WNV
Plymouth     Hanson 8/18/2020 Culex salinarius WNV
Norfolk     Dover 8/18/2020 Culex pipiens / restuans complex WNV
Norfolk     Braintree 8/19/2020 Culex pipiens / restuans complex WNV
Norfolk     Quincy 8/19/2020 Culex pipiens / restuans complex WNV
Bristol     North Attleborough 8/21/2020 Culex pipiens / restuans complex WNV
Plymouth     Carver 8/24/2020 Culiseta melanura EEE
Bristol     Attleboro 8/28/2020 Culex pipiens / restuans complex WNV
Norfolk     Quincy 8/26/2020 Culex pipiens / restuans complex WNV
Middlesex     Cambridge 9/01/2020 Culex pipiens / restuans complex WNV
Middlesex     Cambridge 9/01/2020 Culex pipiens / restuans complex WNV
Middlesex     Waltham 9/01/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 9/01/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 9/01/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 9/01/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 9/01/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 9/01/2020 Culex pipiens / restuans complex WNV
Suffolk     Chelsea 9/01/2020 Culex pipiens / restuans complex WNV
Suffolk     Chelsea 9/01/2020 Culex pipiens / restuans complex WNV
Plymouth     Middleborough 9/01/2020 Culex pipiens / restuans complex WNV
Bristol     Fall River 9/03/2020 Culex pipiens / restuans complex WNV
Bristol     Attleboro 9/04/2020 Culex pipiens / restuans complex WNV
Norfolk     Norfolk 9/02/2020 Culex pipiens / restuans complex WNV
Hampden     Holyoke 9/02/2020 Culex pipiens / restuans complex WNV
Norfolk     Westwood 9/09/2020 Culex pipiens / restuans complex WNV
Norfolk     Quincy 9/09/2020 Culex pipiens / restuans complex WNV
Bristol     Easton 9/09/2020 Culiseta melanura WNV
Middlesex     Lexington 9/09/2020 Culex pipiens / restuans complex WNV
Middlesex     Lexington 9/10/2020 Culex pipiens / restuans complex WNV
Middlesex     Wayland 9/10/2020 Culex pipiens / restuans complex WNV
Plymouth     Middleborough 9/15/2020 Culex pipiens / restuans complex WNV
Plymouth     Middleborough 9/15/2020 Culiseta melanura EEE
Suffolk     Boston 9/10/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 9/17/2020 Culex pipiens / restuans complex WNV
Suffolk     Boston 9/17/2020 Culex pipiens / restuans complex WNV

 

Date published: July 6, 2020
Last updated: September 24, 2020
Feedback