West Nile detected in Boston mosquitos for first time in 2021

BOSTON — West Nile Virus has been detected in mosquitos in Boston for the first time in 2021, the Boston Public Health Commission announced Friday. The sample that produced the positive test was collected from Jamaica Plain on July 14.

There have not been any human or animal cases of West Nile or EEE - Eastern Equine Encephalitis - in Boston this year. There were no cases of West Nile in humans among Boston residents in 2020 or 2019, though there were seven human cases among city residents in 2018. West Nile has been detected in Boston mosquitos every year since 2000.

“It is typical to find West Nile Virus in mosquitoes in Boston at this time of year,” said Dr. Sarimer Sanchez, the director of the Infectious Disease Bureau at the Boston Public Health Commission in a BPH release Friday.

“However, it is also that time of year when many of us will be spending time outdoors, enjoying summertime in New England. When you or your family are outside, it is important that you take steps to prevent mosquito bites. That includes using an approved mosquito repellent, draining standing water from your yard and repairing window screens to keep mosquitos out of your home.”

Mosquitos are most active from dawn to dusk from July through September but can be active as late as November.

This is a developing story. Check back for updates as more information becomes available.

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