California County Pronounced Equine Herpesvirus-Free

All horses at a San Bernardino County premises have completed quarantine requirements.
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California County Prounounced Equine Herpesvirus-Free
On Jan. 14, California Department of Food and Agriculture (CDFA) officials released all exposed horses on a San Bernardino County premises from quarantine for equine herpesvirus-1 (EHV-1). | Photo: Wikimedia Commons
On Jan. 14, California Department of Food and Agriculture (CDFA) officials released all exposed horses on a San Bernardino County premises from quarantine for equine herpesvirus-1 (EHV-1). All exposed horses on the affected premises had two negative tests seven days apart, meeting testing requirements for release.

Outbreak Recap

The outbreak began on Oct. 29, when a 13-year-old Quarter Horse mare displayed neurologic signs and fever and was subsequently euthanized due to the severity of her signs. Postmortem testing confirmed her positive on Nov. 5, and 20 exposed horses on her home premises were quarantined and monitored for the disease.

A second horse, a 22-year-old Paint gelding, subsequently tested positive and was euthanized, with three additional horses on the premises testing positive.

On Nov. 19, CDFA officials confirmed that one of the three horses that tested positive, a 24-year-old Quarter Horse mare, developed severe neurologic signs and was euthanized on Nov. 16

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