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South Carolina Confirms First 2019 WNV Case

November 7, 2019
Posted by Edited Press Release

The state’s index case resides in Pickens County.

Topics: Article, Horse Care, Horse Industry News, Neurologic Disease, Welfare and Industry, West Nile Virus (WNV)

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South Carolina Confirms First 2019 WNV Case

Officials from Clemson Livestock Poultry Health (CLPH) confirmed South Carolina’s first case of West Nile virus (WNV) in 2019 in Pickens County. | Photo: Wikimedia Commons

Officials from Clemson Livestock Poultry Health (CLPH) confirmed South Carolina’s first case of West Nile virus (WNV) in 2019 in Pickens County. The 14-year-old Quarter Horse gelding had been vaccinated. He is reported as affected and alive and under voluntary quarantine.

About West Nile Virus

West Nile virus transmission occurs when infected mosquitoes feed on animals, as well as humans, after having fed on infected birds.

Clinical signs of WNV in horses include:

Mild anorexia and depression
Fine and coarse muscle and skin fasciculation (twitching);
Hyperesthesia (hypersensitivity to touch and sound);
Changes in mentation (mentality), when horses look like they’re daydreaming or “just not with it”;
Occasional drowsiness;
Propulsive walking (driving or pushing forward, often without control); and
Spinal signs, including asymmetrical weakness; and
Asymmetrical or symmetrical ataxia (incoordination).

West Nile virus has no cure; however, some horses can recover with supportive care. Equine mortality rates can reach 30-40%. The American Association of Equine Practitioners includes WNV as one of the core diseases all horses should be vaccinated against at least annually

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