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

Modoc County, CA

Outbreak Identifier: 5599

Alert ID: 3008

May 10, 2023

Confirmed Case(s) - Official Quarantine

Source: California Department of Food and Agriculture

Number Confirmed: 1;
Number Exposed: 6;
Facility Type: Private Facility;
Age: 8; Gender: Mare; Breed: Quarter Horse (QH); Usage: Barrel Racing; Onset of Clinical Signs: 5/3/2023;
Clinical Signs: Acute hind limb ataxia, dragging hind feet, loss of urine bladder control.; Confirmation Date: 5/8/2023; Horse Status: Affected And Alive;
Comments: An 8-year-old Quarter Horse mare in Modoc County displaying acute neurologic signs was confirmed positive for Equine Herpesvirus Myeloencephalopathy (EHM) secondary to Equine Herpesvirus-1 (EHV-1, non-neuropathogenic strain) on May 8th. The mare is alive and under veterinary care. The mare and six (6) potentially exposed horses on the home premises in Modoc County have been quarantined with enhanced biosecurity measures implemented. CDFA will continue to actively monitor the situation.

Update: No additional cases were confirmed during the quarantine monitoring period. The quarantine has been released.

https://www.equinediseasecc.org/equine-herpesvirus

Search for County

Disease Alerts