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Boston health officials reported Thursday that for the first time this summer, a sampling of mosquitoes has tested positive for West Nile Virus. The mosquitoes were found in Roslindale.

These are the first mosquitoes to test positive anywhere in Massachusetts this year. No human cases of the virus have been reported so far.

“The recent combination of hot weather and rain may have contributed to West Nile appearing slightly earlier this year than in some previous years, and people should take some simple precautions to avoid mosquito bites,” Dr. Anita Barry, director of the Infectious Disease Bureau at the Boston Public Health Commission, said in a statement.


Recommended precautions include using insect repellent when outside, especially from dusk to dawn when mosquitoes are more likely to bite, and wearing long pants and long sleeves. Check that window and door screens are in good repair; and to keep mosquitoes from breeding, empty standing water in flower pots, kiddie pools, and garbage cans.