In recent years, EHV-1 outbreaks at local and FEI shows have had drastic consequences, including numerous horses lost, dozens of show cancellations, and strict quarantines. Because some sectors of the equine community compete throughout the season, multiple shows, barns, and geographic regions can be at risk within a few days.

Yes, EHV-1 has been identified on wood shavings, leather, and other supplies for at least 48 hours, even on items stored outside or in cool temperatures.These findings emphasize the need for increased biosecurity, particularly within high-volume equine-related facilities.

Multiple outbreaks have occurred due to the arrival or return of horses, including clinically healthy horses. Incorporating EHV-1 monitoring–especially for horses traveling from high-risk areas or events–better protects local and international equine populations.

Equine Herpesvirus 1 (EHV-1) is a common and burdensome DNA virus in horse populations globally. It is highly contagious and spreads through direct horse-to-horse contact or indirect contact e.g. contaminated hands,  equipment. Moreover, the neurologic form of the disease is particularly troublesome due to associated degrees of paralysis and is seen in approximately 10% of infected horses.

Current diagnostic testing requires use of PCR for specific diagnosis as clinical signs of EHV-1 mimic that of other respiratory pathogens and neurological diseases.

Due to the different presentations of EHV-1, correct and timely testing helps improve biosecurity.

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