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Tuesday, August 28, 2012

DEM finds more infected mosquitoes, this time in Charlestown

Highlands J Virus found in Cross Mills
RI DEM news release

PROVIDENCE -- The Department of Environmental Management announces that test results from 111 mosquito pools, or samples, from 39 traps set statewide during the week of August 14 are negative for both West Nile Virus and Eastern Equine Encephalitis. 

One mosquito pool, or sample, from a trap set in the Cross Mills area of Charlestown has been confirmed positive for Highlands J Virus. 

Highlands J virus is a bird disease that doesn't affect humans, but which is an indicator that environmental conditions are appropriate for the transmission of other mosquito-borne viruses. Results are pending for an additional 34 pools of mosquitoes that were trapped during the week of August 14.

Throughout the mosquito season, residents are encouraged to protect themselves by eliminating mosquito breeding grounds and avoiding mosquito bites. 

Personal protection is the first line of defense against mosquitoes that can carry diseases such as West Nile Virus and EEE and is by far the most effective way of avoiding infection. Eliminate mosquito breeding grounds from yards by removing anything that holds standing water such as old tires and buckets, clean gutters so that they drain correctly, and maintain swimming pools properly. 

Mosquitoes breed in standing water. Just one cup of standing water can produce hundreds of mosquitoes. Avoid mosquito bites by using screens on windows and doors, covering up at dawn and dusk, and putting mosquito netting over playpens and baby carriages when they are outside. Also, use mosquito repellent, but with no more than 30 percent DEET. Do not use repellent on infants.

Mosquitoes are trapped every week statewide by DEM staff and tested at the RI Department of Health (HEALTH) laboratory. DEM will normally report mosquito test results once a week on a routine basis, with additional reports as necessary. Test results from mosquitoes trapped this week will be included in next week's announcement. Positive mosquito test results will generally trigger additional trapping to assess risk.

This year, to date in Rhode Island, two pools of mosquitoes has tested positive for West Nile Virus and one mosquito pool has tested positive for Eastern Equine Encephalitis.

For online information about mosquito-borne diseases, go to DEM's website,, and click on "Public Health Updates", or go to the HEALTH website,, and click on "E" (Eastern Equine Encephalitis) or "W" (West Nile Virus) under "Health Topics".