Two independent horses in Brazos County, Texas have tested positive for West Nile virus (WNV). Both cases are unrelated and occur on separate properties. WNV is a mosquito-borne virus that can severely impact equine health. Early detection, vaccination, and mosquito control are key to preventing disease spread.
The Equine Disease Communication Center (EDCC) confirmed these reports, providing verified updates for horse owners across the state.
What Horse Owners Should Know About WNV
West Nile virus is transmitted to horses through bites from infected mosquitoes. Not all infected horses display clinical signs, but symptoms can include:
- Mild anorexia and depression (flu-like signs)
- Muscle and skin twitching (fasciculations)
- Hypersensitivity to touch or sound (hyperesthesia)
- Mental changes (appearing “spaced out” or inattentive)
- Occasional drowsiness
- Propulsive walking (pushing forward uncontrollably)
- Spinal or neurological signs, including weakness or ataxia
⚠️ WNV has no cure, and equine mortality rates can reach 30–40%. Some horses recover with supportive care, but prevention remains crucial.
Vaccination Guidelines for WNV
Vaccines are effective tools to reduce the risk of WNV infection:
- Previously vaccinated horses:
- Receive an annual booster, or in high-risk areas, spring and fall boosters.
- Unvaccinated horses:
- Require a two-shot series spaced 3–6 weeks apart.
- Protection develops several weeks after vaccination or booster.
Consult your veterinarian to determine the best vaccination schedule for your horses, especially in mosquito-prone areas.
Mosquito Control and Biosecurity Tips
Reducing mosquito exposure is critical for WNV prevention:
- Remove stagnant water to prevent breeding.
- Clean and refill water buckets and troughs regularly.
- Keep horses indoors during peak mosquito activity (dawn and dusk).
- Apply equine-approved mosquito repellents when necessary.
Combined with vaccination, these measures significantly reduce the risk of infection.
Take-Home Message
The West Nile Virus in Texas Horses cases in Brazos County serve as a reminder that mosquito-borne diseases remain a serious threat.
Horse owners should:
- Ensure proper vaccination protocols
- Reduce mosquito breeding and exposure
- Monitor horses closely for neurological or flu-like signs
By acting proactively, owners can protect their horses’ health and minimize the risk of WNV outbreaks.
