Aerial mosquito-spraying announced

The Vermont Department of Health has announced that it will conduct aerial insecticide spraying August 22 and 27 of a swampy area of Whiting in an effort to combat the spread of deadly mosquito-borne Eastern Equine Encephalitis (EEE).

Spraying of a low concentration of Anvil 10+10 (Sumithrin) will be performed within a two-mile radius centered round the swampy area north of Stickney Road in Whiting. The activity is scheduled to begin at dusk each evening and continue to about 11 p.m. The spraying may be postponed in case of rain.

EEE was detected for the first time in Vermont last year. Two people became ill with the virus and later died. The health department has stepped up testing of mosquito pools in certain areas of the state this year. No EEE was detected through the early summer.

Charts shows results of state mosquito testing in 2013.

That changed with testing of a mosquito pool collected from the Whiting area on Aug. 1. EEE turned up in test results, and the health department warned residents to take reasonable precautions against mosquito bites, including wearing long pants and long-sleeved shirts outdoors during times of mosquito activity and using insect repellants.

Today the health department announced that four more mosquito pools from the area, collected on Aug. 10 and 12, have tested positive for EEE. The virus has not been detected in humans or animals so far this year.

"These newest detections only intensify our recommendations to Vermonters to fight the bite, no matter where you live," Health Commissioner Harry Chen said. "We can't kill every mosquito, but targeted spraying may knock back the local population of mosquitoes that are carrying the EEE virus.

"Spraying could reduce risk of infection," he explained, "but it's still important that we all take precautions against mosquito bites."

State health officials believe EEE is present in other parts of the state, but it has so far been positively identified only in mosquito pool tests from southern Addison and northern Rutland counties. Testing is being concentrated in in certain areas of the state (See map).