California has one new confirmed case of EHV-1. There are a total of 22 confirmed EHV-1/ EHM cases in the state. This new confirmed case is located on the same premises in Glenn County as the last three confirmed cases.
The positive confirmed cases are located in the following 12 counties: Amador(1), Colusa(1), Glenn(6), Kern(2), Los Angeles(1), Marin(1), Napa(1), Placer (3), Plumas(1), Shasta(1), Stanislaus(3) and Ventura(1).
Sixteen(16) of the confirmed positive EHV-1/EHM CA cases participated in the National Cutting Horse Association’s Western National Championships in Ogden, Utah.
One (1) of the confirmed positive EHV-1/ EHM CA cases participated only in the Kern County Cutting Horse Event on May 13th in Bakersfield, CA.
Five (5) of the confirmed positive EHV-1/EHM CA cases were exposed horses to an Ogden, UT participant.
Two (2) confirmed positive EHM horses were euthanized after showing severe neurological signs associated with EHM.
Eight (8) confirmed positive horses displayed neurologic signs.
Thirteen (13) confirmed positive horses displayed only a fever.
One (1) confirmed positive horse displayed only a nasal discharge.
On June, 6, 2011, the total number of confirmed cases in California was reduced by one (1). The total number of California confirmed cases went from 22 cases to 21 cases. Initially, the horse in question had a low viral load on nasal swab and using an abundance of caution, was placed under quarantine. This Sacramento County horse did not have any clinical signs nor did any of the horses in the same barn. Due to the lack of clinical signs this horse does not meet the confirmed clinical case definition and was removed from the case count.
