Outbreaks | Equine Disease Communication Center

Updates on current disease outbreaks are listed here as they occur and will include the date listed, disease name, location and current status. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.

Disease

Outbreak States

Start Date

End Date

Search by Alert ID

Search by Outbreak ID

1 Week

2 Weeks

1 Month

2 Months

3 Months

3+ Months

No Results

The color range is based off of the selected End Date. If the End Date doesn't have a value it will use Today's Date.

Equine Herpesvirus- Neurologic

Monterey County, CA

Outbreak Identifier: 5566

Alert ID: 2965

April 14, 2023

Confirmed Case(s) - Official Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 1
Number Exposed: 25
Facility Type: Private Facility
Age: 25; Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 4/10/2023
Clinical Signs: Fever of two days duration followed by acute severe neurological signs. Confirmation Date: 4/13/2023; Horse Status: Euthanized
Comments: A 25-year-old Quarter Horse gelding in Monterey County displaying fever followed by acute neurologic signs was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to Equine Herpesvirus-1 (EHV-1, non-neuropathogenic strain) on April 13th. The gelding was euthanized due to severity of clinical signs and had no recent travel or show history. Twenty-five (25) potentially exposed horses on the gelding’s home premises in Monterey County have been quarantined with enhanced biosecurity measures implemented. CDFA will continue to actively monitor the situation. For more information and updates, go to: https://www.cdfa.ca.gov/ahfss/Animal_Health/equine_herpes_virus.html

For more information about EHM, go to: https://www.equinediseasecc.org/equine-herpesvirus

Search for County

Disease Alerts