Texas WNV Case Count Rises to 38

The affected horses were either unvaccinated or were not up-to-date on their vaccinations.

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The total number of Texas horses testing positive for West Nile virus (WNV) has reached 38

Typically, WNV cases are not diagnosed this late into the year; however, this year suspect specimens were sent to the Texas A&M Veterinary Medical Diagnostic Laboratory (TVMDL) into December. It is expected that WNV cases will drop off as the weather across the state cools and the environment for the mosquitoes that are the vector for the disease diminishes.

As of Dec. 18, the TVMDL can confirm horses in the following counties tested positive for WNV in 2015:

  1. Houston County
  2. Atascosa County
  3. Jefferson County (4 cases)
  4. Roberts County
  5. Sterling County
  6. Parker County
  7. Randall County
  8. Liberty County
  9. Scurry County
  10. Hutchinson County
  11. Taylor County
  12. Nolan County
  13. Trinity County
  14. Robertson County (2 cases)
  15. Midland County
  16. Orange County
  17. Harris County (3 cases)
  18. Victoria County
  19. Cooke County
  20. Chambers County (2 cases)
  21. Erath County
  22. Freestone County
  23. Smith County
  24. Nueces County
  25. Collin County
  26. Wichita County
  27. Lavaca County
  28. Jackson County
  29. Angelina County

"The number of West Nile virus cases we have seen in 2015 points out the risk to our equine population and the importance of vaccination," said TVMDL Assistant Director Terry Hensley, MS, DVM. "The horses represented in these cases were either unvaccinated or had lapsed in their vaccinations. The majority of the horses exhibited classical neurological signs which indicates the importance of diagnostic testing as an aid in confirming a clinical diagnosis

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