shutterstock_121589452Two more mosquito pools in Boston have tested positive for West Nile Virus (WNV).  Tests performed earlier this week confirmed positive mosquito pools in Roslindale and West Roxbury.  Within the past month, WNV-positive mosquito pools have also been discovered in Jamaica Plain and Hyde Park.  However, there have been no recorded human cases of mosquito-borne illnesses in Boston this year.

The Boston Public Health Commission encourages people to take simple precautions to reduce the risk of mosquito bites.  These steps include using insect repellant when outdoors, especially from dusk to dawn when mosquitoes are more likely to be biting and, when possible, wearing clothing that includes long sleeves and pants.  People should also mosquito-proof their home by making sure that their window and door screens are in good repair to prevent mosquitoes from getting into the house.

To prevent mosquitoes from breeding, the Boston Public Health Commission advises people to turn over unused flower pots, buckets, wheelbarrows, and garbage cans; remove leaves and other debris that can clog gutters and trap water; dispose of or cover old tires; and cover swimming pools when not in use.

WNV is most commonly transmitted to humans by the bite of a mosquito infected with the virus, but it poses very low risk to most people.  The risk can be further reduced by following simple safety measures.
The City of Boston, in partnership with the Suffolk County Mosquito Control Project, has placed larvicide in catch basins and wetlands around the city, a process designed to reduce the mosquito population.  Targeted, truck-mounted aerosol spraying is also being performed to help control the mosquito population in certain areas of Boston.  Spraying was recently conducted in Hyde Park and in East Boston.

BPHC offers fact sheets in a variety of languages to help educate people on the risks associated with WNV:

For more information on mosquito-borne illness, call the Boston Public Health Commission at 617-534-5611 or visit