TVMDL Reports Additional Equine WNV Cases in Texas

As of Aug. 24, a total of 10 horses–all unvaccinated–have tested positive for WNV.
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Additional equine West Nile virus (WNV) cases have been diagnosed by the Texas A&M Veterinary Medical Diagnostic Laboratory (TVMDL). The number of WNV positive cases in Texas now totals ten.

As of Aug. 24, the TVMDL can confirm that a total of 10 horses residing in Houston, Atascosa, Jefferson, Roberts, Sterling, Parker, Randall, Liberty, Scurry, and Hutchinson counties have tested positive for WNV.

As with earlier reported positive cases, the affected horses were not previously vaccinated against the disease.

West Nile is transmitted to horses via bites from infected mosquitoes. Clinical signs for WNV include flulike signs, where the horse seems mildly anorexic and depressed; fine and coarse muscle and skin fasciculations (twitching); hyperesthesia (hypersensitivity to touch and sound); changes in mentation (mentality), when horses look like they are daydreaming or "just not with it"; occasional somnolence (drowsiness); propulsive walking (driving or pushing forward, often without control); and "spinal" signs, including asymmetrical weakness. Some horses show asymmetrical or symmetrical ataxia. Equine mortality rate can be as high as 30-40%

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