The Jefferson County Public Health Service has been notified by the New York State Department of Health that a 6-year-old, unvaccinated horse, who died in the Town of Antwerp, was positive for Eastern Equine Encephalitis (EEE, Triple E). Results are pending for another horse residing in the Town of Orleans who was exhibiting similar symptoms. The last lab-confirmed positive EEE cases in Jefferson County horses
occurred in 2020.
Antwerp is located in upstate New York approximately 90 miles north of Syracuse.
EEE is very rare but serious. Mosquitoes infected with EEE virus (EEEV) can infect people, horses and
other mammals, some birds, reptiles and amphibians. About 5-10 EEE human cases are reported each
year in the U.S. Five cases of EEE in people in New York State have been reported since 1971. These
cases were reported in 1971, 1983, 2009, 2010 and 2011 and occurred in Oswego and Onondaga counties. All five cases died.
The risk of getting EEE is highest from late July through September. People at the greatest risk of developing severe disease are those over 50 years of age and younger than 15 years of age. There is no specific treatment available for EEE.
To keep your yard free from standing water to reduce the mosquito population near your home:
Throw away outdoor containers, ceramic pots, or containers that hold water
Remove all tires from your property
Drill holes in the bottoms of recycling containers that are kept outdoors
Clean clogged rain gutters and make sure they continue to work properly
Turn over wheelbarrows and wading pools when not in use
Change water in bird baths at least every four days
Clear vegetation and debris from the edges of ponds
Clean chlorinated swimming pools, outdoor saunas, and hot tubs
Drain water from pool covers
Use landscaping to eliminate low spots where standing water accumulates
Horse owners should speak to their veterinarians about vaccination against EEE.
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