With recent reports of EHV-1 and EHM in the U.S., we encourage everyone to rely on credible, up-to-date sources for information. Instead of social media posts that may be incomplete or inaccurate, please refer to trusted resources such as the EDCC, AAEP, and CAHSS for the most current and accurate updates.
Resources and Videos:
Current EHV-1 and EHM Outbreak Numbers by State: https://equinediseasecc.org/news/article/Equine-Herpesvirus-Myeloencephalopathy-(EHM)-Outbreak
EDCC Dashboard for States and Provinces (Map): https://www.equinediseasecc.org/alerts
AAEP resources, updated Nov. 24, 2025: https://aaep.org/resource/ehm-and-ehv-faq/
AAEP – EDCC Horse Owner Webinar from Nov. 25, 2025: https://aaep.org/event/horse-owner-webinar-ehv-1-updates/ with Dr. Lewis R. “Bud” Dinges (Texas Animal Health Commission Executive Director and Texas State Veterinarian), Dr. Krista Estell (AAEP/EDCC) and Dr. Katie Flynn (USEF).
CAHSS resources and videos: https://cahss.ca/cahss-networks/equine
EDCC: What is Equine Herpesvirus and EHM? https://www.equinediseasecc.org/equine-herpesvirus
In this article, you will find links to more specific guidelines, resources, and owner guidance as described below.
Biosecurity:
All of the information resources, including the video above, stress the importance of practicing biosecurity measures, quarantine practices, and other important measures. We encourage the same especially in barns where there is a frequent change-over in horses, at events, and reconsider if the event is worth attending with your horses. For more information on biosecurity measures, please see the resources below:
USEF Webinar on EHV-1 and Biosecurity:https://www.youtube.com/watch?v=ObB8Zp7kOjM
In light of the recent EHV-1 outbreak, horse owners have a lot of questions about biosecurity, EHV-1, and USEF biosecurity policies. Dr. Katie Flynn, USEF senior staff veterinarian, and Dr. Sally Anne DeNotta, board-certified internal medicine specialist and member of the clinical faculty at the University of Florida, were on hand to answer member questions on these crucial topics. This webinar was recorded Dec. 1, 2025.
EDCC: EDCC and United States Equestrian Federation (USEF) have jointly created how-to biosecurity videos for horse owners: https://www.equinediseasecc.org/news/article/Biosecurity-How-To-Videos
EDCC: Equine Guelph’s Be Pro-Active Rather Than Reactive with Biosecurity
We hope that you found this email informative in light of the recent EHV-1 and EHM disease alerts coming from the United States. We will continue to monitor the progression and outcomes and will provide you with follow-ups as they become available.