State environmental officials have not found West Nile virus in the latest round of mosquito tests in Rhode Island.
The state Department of Environmental Management said Monday that 133 mosquito samples from 33 traps set statewide on June 27 tested negative for both West Nile and eastern equine encephalitis.
Results from additional samples collected from 36 traps set on July 5 are pending.
The agency says the best prevention against mosquito-borne illness is avoiding bites.
Residents are urged to use mosquito repellent but with no more than 30 percent DEET, put screens on windows and doors and eliminate areas of standing water where mosquitoes breed.
The agency traps mosquitoes weekly and tests them at the state health laboratories. Weekly advisories on test results are issued from late June through September.