Fourth California Horse Tests Positive for EHV-1

State officials issue an update on the San Bernardino County outbreak.
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Fourth Carolina Horse Tests Positive for EHV-1
The 11-year-old Paint stallion is the fourth horse to develop the neurologic form of EHV-1, and an additional five horses have developed fevers exceeding 101.5°F. | Photo: Wikimedia Commons
The California Department of Food and Agriculture (CDFA), in Sacramento, issued an update on Nov. 25 when one additional horse on the index premise in San Bernardino County developed a fever and was confirmed positive for equine herpesvirus-1 (EHV-1) infection.

The 11-year-old Paint stallion is the fourth horse to develop the neurologic form of EHV-1, and an additional five horses have developed fevers exceeding 101.5°F. Three of the neurologic horses were euthanized due to the severity of their clinical signs, and all other horses on the premises are reported as recovering. CDFA continues to monitor the outbreak.

For the complete outbreak history, see

EHV 101

Herpesvirus is highly contagious among horses and can cause a variety of ailments in equids, including rhinopneumonitis (a respiratory disease usually found in young horses), abortion in broodmares, and EHM

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