Larry Catt, D.V.M.
Larry G. Martin, D.V.M.

24 Hour Emergency
El Cajon (619) 590-1991
Ramona (760) 789-6845

San Diego County has 1st Horse in 2016 with West Nile Virus

Dr. Catt received this email today:

Good afternoon CA Equine Practitioner,

The first case of equine WNV has been confirmed for 2016. A thoroughbred mare met case definition with neurologic signs and a positive IgM Capture ELISA test for West Nile Virus. The positive horse is located in San Diego County. The unvaccinated five (5) year-old mare is alive and recovering slowly.

CDFA continually monitors and investigates equine neurologic cases for the presence of WNV in California. As a reminder, timely and accurate reporting of equine WNV cases by veterinarians is a valuable component of arbovirus disease surveillance and helps to direct mosquito control efforts designed to prevent WNV infection in both horses and humans. For the latest WNV confirmed case count and additional disease information visit or

Mosquitoes thrive in our temperate climate. Please vaccinate your horse(s). Be sure to contact us to verify that your horse is current on its West Nile Virus vaccination or to get your horse vaccinated.