EEE Found in Massachusetts Mosquitoes for First Time in 2025
BELCHERTOWN, HAMPSHIRE COUNTY, MASSACHUSETTS, JUL 23 – Health officials detected the first Eastern equine encephalitis-positive mosquito of 2025, signaling the start of the transmission season with no human or animal cases reported yet.
- Massachusetts officials confirmed the presence of Eastern equine encephalitis virus on July 21, 2025, in a mosquito specimen obtained from Belchertown, Hampshire County.
- This detection follows an active 2024 season with four human EEE cases and one death, and signals a potential rise in risk for the rest of summer 2025.
- The virus was identified in a mosquito of the species Coquillettidia perturbans, and to date in 2025, there have been no reported infections in humans or animals despite ongoing monitoring efforts.
- Public Health Commissioner Robbie Goldstein emphasized that since this is an initial detection, ongoing monitoring of mosquito populations will be essential to identify any regions where the risk may be growing.
- Health officials urged residents to use insect repellent, wear protective clothing, avoid peak mosquito hours, and eliminate standing water to reduce infection risk.
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DPH: First EEE-positive mosquito sample found in Mass.
BOSTON — The Massachusetts Department of Public Health (DPH) own Wednesday announced that Eastern equine encephalitis (EEE) virus has been detected in mosquitoes in Massachusetts for the first time this year. The presence of EEE was confirmed in a mosquito…
Here's where EEE has been found in a mosquito sample in Massachusetts
A mosquito sample in Belchertown has been found to be carrying Eastern equine encephalitis, also known as EEE, marking it as the first detection of 2025, the Massachusetts Department of Public Health (DPH) said Wednesday.DPH officials first found the positive sample on July 21, the department said in a statement.
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