Your Guide to Equine Health Care

EHV-1 Confirmed in California Polo Pony

A 14-year-old polo pony from Riverside County that was euthanized after developing neurologic signs tested positive.

No account yet? Register


The California Department of Food and Agriculture (CDFA) has reported that a polo pony euthanized after developing neurologic signs tested positive for equine herpesvirus-1 (EHV-1).

“A 14-year-old polo mare, in Riverside County, displaying acute onset neurologic signs was euthanized on Sunday, Feb. 7,” the CDFA said in a Feb. 9 statement. “The necropsy results from the California Animal Health and Food Safety Laboratory on Feb. 9 confirmed the non-neuropathogenic strain of EHV-1.”

The CDFA noted that 70 exposed horses have been placed under quarantine with required twice daily temperature monitoring.

“At this time, no additional horses are displaying clinical signs,” the department’s statement said. “All exposed horses will be monitored for clinical signs and fever for 14 days post-exposure. Enhanced biosecurity measures have been implemented and immediate isolation protocols for any horse with a temperature over 102$deg;F, or compatible clinical signs, are in

Create a free account with to view this content. is home to thousands of free articles about horse health care. In order to access some of our exclusive free content, you must be signed into

Start your free account today!

Already have an account?
and continue reading.


No account yet? Register

Written by:

Erica Larson, former news editor for The Horse, holds a degree in journalism with an external specialty in equine science from Michigan State University in East Lansing. A Massachusetts native, she grew up in the saddle and has dabbled in a variety of disciplines including foxhunting, saddle seat, and mounted games. Currently, Erica competes in eventing with her OTTB, Dorado.

Related Articles

Stay on top of the most recent Horse Health news with

FREE weekly newsletters from

Sponsored Content

Weekly Poll

sponsored by:

This poll is no longer accepting votes

Which hoof problem do you encounter most often in your horses?
342 votes · 342 answers

Readers’ Most Popular

Sign In

Don’t have an account? Register for a FREE account here.

Need to update your account?

You need to be logged in to fill out this form

Create a free account with!