Source:  CDFA

California EHV-1 Causing EHM Disease Update as of 1 pm 5/29/2011 ( In observance of  the holiday the next posting will be Tuesday May 31, 2011)

California has one new confirmed case of Equine Herpes Myeloencephalopathy (EHM) caused by EHV-1. There are now 19 confirmed EHM cases in the state. 

• Today’s confirmed case is a febrile horse in Colusa County which did not compete at the Ogden, UT or Bakersfield, CA event.  However, this horse was exposed to horses participating in those events.
• The suspect case reported on 5/28 with low grade fever and moderate compatible neurologic signs has not yet been confirmed positive. The horse did not participate in Ogden, UT or Bakersfield CA events. The horse was exposed at home premises to one of the California confirmed EHM positive horses which participated in the Ogden, UT event.
• The positive confirmed cases are located in the following 13 counties: Amador(1), Colusa(1), Glenn(2), Kern(2), Los Angeles(1), Marin(1), Napa(1), Placer (3), Plumas(1), Sacramento (1), Shasta(1), Stanislaus(3) and Ventura(1).
• Sixteen(16) of the confirmed positive EHM CA cases participated in the National Cutting Horse Association’s Western National Championships in Ogden, Utah.
• Two (2) of the confirmed positive EHM CA cases participated only in the Kern County Cutting Horse Event on May 13th in Bakersfield, CA.
• One confirmed positive EHM horse was euthanized after showing severe neurological signs associated with EHM.
• All positive confirmed EHM cases are under a State Quarantine.