Oregon’s First Equine WNV Case of 2012 Confirmed
Erica Larson
August 24, 2012
The affected horse was identified in Klamath County, Ore. It is the state’s first equine WNV case of 2012.
The affected horse was identified in Klamath County, Ore. It is the state’s first equine WNV case of 2012.
A new EPM test uses three antigens to measure the antibody response to parasite infection in serum or CSF.
Neither horse was vaccinated against the disease, and both were euthanized due to disease progression.
Infected horses present with ataxia, which is a lack of voluntary coordination of muscle movements.
The horses, both from northern Wisconsin, were confirmed positive via blood tests on Aug. 21.
Five cases have been confirmed in Kentucky and six have been confirmed in California.
The Arabian colt from Scott County received a vaccination in March, but did not receive a follow-up booster.
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EEE and WNV have stricken hundreds of horses in Wisconsin since 2001.
More than 70 equine West Nile virus cases have already been diagnosed in the United States in 2012.
A horse in Jackson County has tested positive for WNV, the first in the state to do so since 2010.
An unvaccinated 16-month-old Tennessee Walking Horse colt from Warren County tested positive today.
The WNV positive horses are from Fremont, Weld, Montrose (2), and Larimer counties.
More than 70 horses on 22 premises in Western Canada have tested positive for EIA thus far in 2012.
The affected horse–an 18-year-old Tennessee Walking Horse from Laurel County–had no WNV vaccination history.
An 11-year-old Quarter Horse mare from Salem County has tested positive for West Nile virus (WNV).
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