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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.

Table of Contents

Human detection of EEE/WNV

County name   Age Onset Virus Result Presentation
Middlesex   80-89 7/30/2021 WNV Neuroinvasive
Middlesex   50-59 7/18/2021 WNV Fever
Essex   70-79 7/24/2021 WNV Encephalitis
Middlesex   70-79 8/15/2021 WNV

Meningoencephalitis

Middlesex   70-79 8/23/2021 WNV Meningitis
Middlesex   60-69 9/03/2021 WNV Meningitis
Bristol   30-39 9/02/2021 WNV Meningitis
Middlesex   50-59 9/19/2021 WNV Meningoencephalitis
Middlesex   60-69 9/21/2021 WNV Encephalitis

Animal detection of EEE/WNV

County name Age Onset Virus Result Species
Middlesex 12 9/4/2021 WNV Alpaca

Mosquito detection of EEE/WNV

County City Date Collected Species Agents
Middlesex Medford 6/29/2021 Culex pipiens/restuans complex WNV
Middlesex Belmont 7/13/2021 Culex pipiens/restuans complex WNV
Middlesex Belmont 7/13/2021 Culex pipiens/restuans complex WNV
Middlesex Belmont 7/13/2021 Culex pipiens/restuans complex WNV
Middlesex Watertown 7/13/2021 Culex pipiens/restuans complex WNV
Middlesex Watertown 7/13/2021 Culex pipiens/restuans complex WNV
Middlesex Watertown 7/13/2021 Culex pipiens/restuans complex WNV
Middlesex Watertown 7/13/2021 Culex pipiens/restuans complex WNV
Middlesex Watertown 7/13/2021 Culex pipiens/restuans complex WNV
Middlesex Watertown 7/13/2021 Culex pipiens/restuans complex WNV
Barnstable Falmouth 7/13/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 7/14/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 7/20/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 7/20/2021 Culex pipiens/restuans complex WNV
Norfolk Quincy 7/21/2021 Culex pipiens/restuans complex WNV
Middlesex Burlington 7/27/2021 Culex pipiens/restuans complex WNV
Middlesex Waltham 7/27/2021 Culex pipiens/restuans complex WNV
Middlesex Waltham 7/27/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 7/27/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 7/27/2021 Culex pipiens/restuans complex WNV
Suffolk Chelsea 7/27/2021 Culex pipiens/restuans complex WNV
Essex Lynnfield 7/26/2021 Culex pipiens/restuans complex WNV
Hampden Hampden 7/28/2021 Culex salinarius WNV
Bristol Mansfield 7/30/2021 Culex salinarius WNV
Worcester Uxbridge 7/31/2021 Culex species WNV
Plymouth Kingston 8/2/2021 Culex pipiens/restuans complex WNV
Middlesex Arlington 8/3/2021 Culex pipiens/restuans complex WNV
Middlesex Cambridge 8/3/2021 Culex pipiens/restuans complex WNV
Middlesex Everett 8/3/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 8/3/2021 Culex pipiens/restuans complex WNV
Hampden Agawam 8/4/2021 Culex pipiens/restuans complex WNV
Bristol Attleboro 8/6/2021 Culex pipiens/restuans complex WNV
Norfolk Sharon 8/3/2021 Culex pipiens/restuans complex WNV
Norfolk Westwood 8/3/2021 Culex pipiens/restuans complex WNV
Norfolk Medway 8/4/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 8/10/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 8/10/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 8/10/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 8/10/2021 Culex pipiens/restuans complex WNV
Hampden Springfield 8/11/2021 Culex salinarius WNV
Hampshire Hadley 8/5/2021 Culiseta melanura WNV
Bristol Swansea 8/12/2021 Culex pipiens/restuans complex WNV
Bristol Dighton 8/13/2021 Culex pipiens/restuans complex WNV
Worcester Worcester 8/13/2021 Aedes vexans WNV
Worcester Worcester 8/13/2021 Culex pipiens WNV
Norfolk Quincy 8/13/2021 Culex pipiens/restuans complex WNV
Middlesex Woburn 8/16/2021 Culex pipiens/restuans complex WNV
Middlesex Concord 8/17/2021 Culex pipiens/restuans complex WNV
Middlesex Concord 8/17/2021 Culex pipiens/restuans complex WNV
Middlesex Maynard 8/17/2021 Culex pipiens/restuans complex WNV
Middlesex Maynard 8/17/2021 Culex pipiens/restuans complex WNV
Hampden Palmer 8/17/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 8/17/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 8/17/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 8/17/2021 Culex pipiens/restuans complex WNV
Berkshire Richmond 8/13/2021 Culex pipiens/restuans complex WNV
Plymouth Halifax 8/17/2021 Culex pipiens/restuans complex WNV
Franklin Leyden 8/18/2021 Culex pipiens/restuans complex WNV
Bristol Swansea 8/19/2021 Culex pipiens/restuans complex WNV
Bristol Swansea 8/19/2021 Culex pipiens/restuans complex WNV
Norfolk Sharon 8/17/2021 Culex pipiens/restuans complex WNV
Norfolk Randolph 8/17/2021 Culex pipiens/restuans complex WNV
Norfolk Quincy 8/18/2021 Culex pipiens/restuans complex WNV
Middlesex Billerica 8/20/2021 Culex pipiens/restuans complex WNV
Worcester Uxbridge 8/20/2021 Culex species WNV
Worcester Uxbridge 8/20/2021 Culex species WNV
Middlesex Stoneham 8/24/2021 Culex pipiens/restuans complex WNV
Middlesex Woburn 8/24/2021 Culex pipiens/restuans complex WNV
Worcester Spencer 8/24/2021 Culex pipiens/restuans complex WNV
Hampden Springfield 8/26/2021 Culex pipiens/restuans complex WNV
Hampden Springfield 8/26/2021 Culex pipiens/restuans complex WNV
Hampden Springfield 8/26/2021 Culex pipiens/restuans complex WNV
Hampden Agawam 8/26/2021 Culex pipiens/restuans complex WNV
Hampden Agawam 8/26/2021 Culex pipiens/restuans complex WNV
Bristol Seekonk 8/26/2021 Culex pipiens/restuans complex WNV
Worcester Southbridge 8/26/2021 Culex salinarius WNV
Worcester Grafton 8/24/2021 Culex pipiens/restuans complex WNV
Worcester Clinton 8/24/2021 Culex pipiens/restuans complex WNV
Worcester Northbridge 8/26/2021 Culex pipiens/restuans complex WNV
Barnstable Sandwich 8/27/2021 Culex pipiens/restuans complex WNV
Middlesex Lincoln 8/27/2021 Culex pipiens/restuans complex WNV
Norfolk Wellesley 8/31/2021 Culex pipiens/restuans complex WNV
Norfolk Wellesley 8/31/2021 Culex pipiens/restuans complex WNV
Norfolk Wellesley 8/31/2021 Culex pipiens/restuans complex WNV
Middlesex Weston 8/31/2021 Culex pipiens/restuans complex WNV
Essex Nahant 8/30/2021 Culex pipiens WNV
Essex Marblehead 8/30/2021 Culex salinarius WNV
Essex Swampscott 8/30/2021 Aedes vexans WNV
Essex Danvers 8/30/2021 Culex salinarius WNV
Essex Boxford 8/30/2021 Culiseta melanura WNV
Essex Wenham 8/31/2021 Culex salinarius WNV
Hampshire South Hadley 8/25/2021 Culex salinarius WNV
Suffolk Boston 8/25/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 8/25/2021 Culex pipiens/restuans complex WNV
Suffolk Boston 8/25/2021 Culex pipiens/restuans complex WNV
Worcester Uxbridge 8/27/2021 Culex species WNV
Plymouth Halifax 8/31/2021 Culex pipiens/restuans complex WNV
Plymouth East Bridgewater 8/31/2021 Ochlerotatus canadensis WNV
Hampden Granville 9/1/2021 Culex pipiens/restuans complex WNV
Hampden Granville 9/1/2021 Culex pipiens/restuans complex WNV
Worcester Sturbridge 8/31/2021 Culex restuans WNV
Worcester Millville 9/1/2021 Culex pipiens WNV
Norfolk Stoughton 9/1/2021 Culex pipiens/restuans complex WNV
Berkshire Otis 9/7/2021 Culex pipiens/restuans complex WNV
Essex Newbury 9/7/2021 Aedes vexans WNV
Essex Newbury 9/7/2021 Culex salinarius WNV
Essex Swampscott 9/8/2021 Aedes vexans WNV
Hampden East Longmeadow 8/31/2021 Culex pipiens/restuans complex WNV
Norfolk Dedham 9/8/2021   WNV
Bristol Fall River 9/9/2021 Culex pipiens/restuans complex WNV
Worcester Worcester 9/8/2021 Culex pipiens/restuans complex WNV
Worcester Hopedale 9/8/2021 Culex pipiens/restuans complex WNV
Worcester Milford 9/8/2021 Culex restuans WNV
Worcester Boylston 9/10/2021 Culex restuans WNV
Middlesex Melrose 9/8/2021 Culex pipiens/restuans complex WNV
Middlesex Burlington 9/9/2021 Culiseta melanura WNV
Suffolk Boston 9/14/2021 Culex pipiens/restuans complex WNV
Berkshire Clarksburg 9/10/2021 Culex pipiens/restuans complex WNV
Plymouth Hanson 9/9/2021 Culiseta melanura WNV
Plymouth Marion 9/14/2021 Culiseta melanura WNV
Bristol Swansea 9/15/2021 Culex pipiens/restuans complex WNV
Bristol Swansea 9/15/2021 Culex pipiens/restuans complex WNV
Bristol Somerset 9/15/2021 Culex pipiens/restuans complex WNV
Bristol Seekonk 9/15/2021 Culex pipiens/restuans complex WNV
Bristol Dighton 9/17/2021 Culex pipiens/restuans complex WNV
Middlesex Marlborough 9/15/2021 Culex pipiens WNV
Middlesex Wilmington 9/17/2021 Culex pipiens/restuans complex WNV
Middlesex Malden 9/16/2021 Culex pipiens/restuans complex WNV
Middlesex Malden 9/16/2021 Culex pipiens/restuans complex WNV
Essex Ipswich 9/16/2021 Psorophora ferox WNV
Essex Ipswich 9/16/2021 Culex salinarius WNV
Worcester Uxbridge 9/17/2021 Culex species WNV
Essex Haverhill 9/20/2021 Aedes vexans WNV
Hampden Hampden 9/22/2021 Culex pipiens/restuans complex WNV
Bristol Seekonk 9/22/2021 Culex pipiens/restuans complex WNV
Bristol Seekonk 9/22/2021 Culex pipiens/restuans complex WNV
Bristol Dartmouth 9/23/2021 Culex pipiens/restuans complex WNV
Worcester Sturbridge 9/21/2021 Culex pipiens/restuans complex WNV
Middlesex Billerica 9/24/2021 Culex pipiens/restuans complex WNV
Worcester Grafton 9/24/2021 Culex species WNV
Essex Newbury 9/28/2021 Culex salinarius WNV
Essex Hamilton 9/28/2021 Culex salinarius WNV
Worcester Athol 9/29/2021 Culiseta melanura WNV
Berkshire Hinsdale 9/24/2021 Culex pipiens/restuans complex  

 

Last updated: October 8, 2021
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