Equine Disease Communication Center

Equine Disease Communication Center The Equine Disease Communication Center (EDCC) works to protect horses and the horse industry from the threat of infectious diseases in North America.

For more information on how the EDCC works, go to http://equinediseasecc.org The communication system is designed to seek and report real time information about disease outbreaks similar to how the Centers for Disease Control and Prevention (CDC) alerts the human population about diseases in people. The goal of the EDCC is to alert the horse industry about disease outbreak information to help miti

gate and prevent the spread of disease. Ultimately frequent and accurate information about diseases outbreaks improves horse welfare and helps to prevent negative economic impact that can result from decreased horse use due to a fear of spreading infection. As part of the National Equine Health Plan the EDCC will serve as part of the communication to help educate and promote research about endemic and foreign disease. Working in cooperation with state animal health officials and the United State Department of Agriculture, the EDCC seeks information about current disease outbreaks from news media, social media, official state reports and veterinary practitioners. Once information is confirmed, it is immediately posted on this website and messages sent to all states and horse organizations by email. Daily updates are posted until each outbreak is contained or deemed no longer a threat. To sign up for the EDCC Disease Outbeak Alert email list, go here: http://eepurl.com/b0dK9z

The EDCC is made possible by generous donations from organizations and horse owners. Please visit our sponsors that have generously supported this program for the benefit of the health and welfare of horses. To learn how you can help go to SUPPORT

June 1, 2026Equine Infectious AnemiaFresno County, CA. Quarantine ReleaseSource: California Department of Food and Agric...
06/01/2026

June 1, 2026
Equine Infectious Anemia
Fresno County, CA.
Quarantine Release
Source: California Department of Food and Agriculture
Number Confirmed: 1;
Number Exposed: 3;
Number Euthanized: 1;
Comments: The three (3) potentially exposed horses on this premises tested negative on the sixty (60) day retest. Quarantine on this premises has been released.;
Previous Alerts: 4946

For more information, go to

Equine infectious anemia (EIA) is a potentially fatal blood-borne infectious viral disease that produces a persistent infection among equids nearly worldwide.

May 30, 2026Equine Herpesvirus- RespiratoryYamhill County, ORType: EHV-1Alert ID: 5018Confirmed Case(s) - Official Quara...
05/30/2026

May 30, 2026
Equine Herpesvirus- Respiratory
Yamhill County, OR
Type: EHV-1
Alert ID: 5018
Confirmed Case(s) - Official Quarantine
Source: State Department of Agriculture
Number Confirmed: 1;
Number Exposed: 4

Equine herpesvirus (EHV) is a family of equine viruses named by numbers including EHV-1, 2, 3, 4 and 5 with EHV-1,3,4 posing the most risk for domestic horses. EHV is a common DNA virus that occurs in horse populations worldwide. The two most common species are EHV-1 and EHV-4.

May 29, 2026Strangles and Equine Herpesvirus-RespiratoryAlert ID: 5017Confirmed Case: Voluntary Quarantine Source: Wisco...
05/29/2026

May 29, 2026
Strangles and Equine Herpesvirus-Respiratory
Alert ID: 5017
Confirmed Case: Voluntary Quarantine
Source: Wisconsin Department of Agriculture, Trade and Consumer Protection
Number Confirmed: 1;
Number Suspected: 1;
Facility Type: Private Facility;
Horse 1:
Age: 18;
Gender: Mare;
Breed: Quarter Horse Cross;
Onset of Clinical Signs: 5/20/2026;
Clinical Signs: Lymphadenopathy;
Confirmation Date: 5/22/2026;
Horse Status: Affected And Alive;
Vaccination Status: Status Unknown;

For more information, go to https://equinediseasecc.org/strangles
and https://equinediseasecc.org/equine-herpesvirus

Equine herpesvirus (EHV) is a family of equine viruses named by numbers including EHV-1, 2, 3, 4 and 5 with EHV-1,3,4 posing the most risk for domestic horses. EHV is a common DNA virus that occurs in horse populations worldwide. The two most common species are EHV-1 and EHV-4.

May 28, 2026Equine Herpesvirus-1 Respiratory, Equine Herpesvirus 4-Respiratory, and Equine InfluenzaPolk County, WI. Ale...
05/28/2026

May 28, 2026
Equine Herpesvirus-1 Respiratory, Equine Herpesvirus 4-Respiratory, and Equine Influenza
Polk County, WI.
Alert ID: 5016
Confirmed Case: Voluntary Quarantine
Source: Wisconsin Department of Agriculture, Trade and Consumer Protection
Number Confirmed: 1;
Number Exposed: 1;
Horse 1:
Age: 3;
Gender: Mare;
Breed: Grade;
Onset of Clinical Signs: 5/25/2026;
Clinical Signs: Fever, cough;
Confirmation Date: 5/28/2026;
Horse Status: Affected And Alive;
Vaccination Status: Undervaccinated;
Comments: This horse is positive for Equine Influenza, EHV-1 Respiratory, and EHV-4 Respiratory.

For more information, go to https://equinediseasecc.org/equine-herpesvirus and https://equinediseasecc.org/equine-influenza

Equine Influenza is a highly contagious though rarely fatal respiratory disease. The virus is distinct from influenzas viruses in other species. The most common form of transmission is airborne droplets in  from affected horses. 

May 28, 2026StranglesKalamazoo, MI.Alert ID: 5015Confirmed Case: Voluntary Quarantine Source: Michigan Department of Agr...
05/28/2026

May 28, 2026
Strangles
Kalamazoo, MI.
Alert ID: 5015
Confirmed Case: Voluntary Quarantine
Source: Michigan Department of Agriculture
Number Confirmed: 1;
Number Suspected: Unknown;
Number Exposed: Unknown;
Horse 1:
Age: 5;
Gender: Gelding;
Breed: Quarter Horse (QH);
Onset of Clinical Signs: 5/15/2026;
Clinical Signs: Lethargy and intermittent fever;
Confirmation Date: 5/27/2026;
Horse Status: Recovering;
Vaccination Status: Undervaccinated;

For more information, go to

The upper respiratory disease commonly referred to as strangles is caused by Streptococcus equi subsp equi. Strangles is spread from horse to horse through direct contact. Horses can also contract the disease by coming into contact with contaminated surfaces. The disease is highly infectious.

May 28, 2026StranglesDouglas County, NEAlert ID: 5014Confirmed Case: Voluntary QuarantineSource: Attending Veterinarian ...
05/28/2026

May 28, 2026
Strangles
Douglas County, NE
Alert ID: 5014
Confirmed Case: Voluntary Quarantine
Source: Attending Veterinarian
Number Confirmed: 2;
Number Suspected: 4;
Number Exposed: 50;
Facility Type: Boarding Facility;
Comments: Horses tested positive 5-22-26, had symptoms for a week before exam and testing.;

For more information, go to

The upper respiratory disease commonly referred to as strangles is caused by Streptococcus equi subsp equi. Strangles is spread from horse to horse through direct contact. Horses can also contract the disease by coming into contact with contaminated surfaces. The disease is highly infectious.

May 27, 2026StranglesRandolph County, WV.Alert ID: 5013Confirmed Case: Voluntary Quarantine Source: Attending Veterinari...
05/27/2026

May 27, 2026
Strangles
Randolph County, WV.
Alert ID: 5013
Confirmed Case: Voluntary Quarantine
Source: Attending Veterinarian
Number Confirmed: 1;
Number Exposed: Unknown;
Facility Type: Private Facility;

For more information, go to

The upper respiratory disease commonly referred to as strangles is caused by Streptococcus equi subsp equi. Strangles is spread from horse to horse through direct contact. Horses can also contract the disease by coming into contact with contaminated surfaces. The disease is highly infectious.

May 26, 2026Vesicular Stomatitis Sandoval County, NMAlert ID: 5012Confirmed Case: Official Quarantine Source: USDA-APHIS...
05/26/2026

May 26, 2026
Vesicular Stomatitis
Sandoval County, NM
Alert ID: 5012
Confirmed Case: Official Quarantine
Source: USDA-APHIS-Veterinary Services
Comments: On May 22, 2026, the National Veterinary Services Laboratories (NVSL) in Ames, Iowa, confirmed vesicular stomatitis New Jersey virus (VSNJV) on an equine premises in Sandoval County, New Mexico. One (1) horse out of 3 horses on the premises had compatible clinical signs and was VSNJV-positive by both polymerase chain reaction (PCR) on swabs of the lesions and competitive enzyme-linked immunosorbent assay (cELISA) on serology. This is the index case of VSV for New Mexico in 2026. Additionally, since the index case was confirmed, a second equine premises in Sandoval County, New Mexico, has horses exhibiting compatible clinical signs of VSV and has been categorized as presumptive positive without testing. All confirmed cases in the 2025-26 outbreak have been vesicular stomatitis New Jersey virus (VSNJV) serotype. Since the start of the outbreak, 18 VSV-affected premises have been identified (17 confirmed positive, 1 presumptive positive) in 3 states, Arizona, Colorado, and New Mexico. All 18 premises have had only equine species clinically affected in six Arizona counties (Cochise, Gila, Maricopa, Pinal, Santa Cruz, and Yavapai Counties), 1 premises in 1 Colorado county (Montezuma County), and 2 premises in 1 New Mexico county (Sandoval County).;

For more information, go to https://www.aphis.usda.gov/livestock-poultry-disease/cattle/vesicular-stomatitis

Additional information can be found here: https://equinediseasecc.org/vesicular-stomatitis

Vesicular stomatitis is a viral disease of horses, donkeys, mules, cattle, swine and New World camelids that occurs in the Western Hemisphere. The disease is named for the characteristic vesicular lesions it causes in the form of blisters, crusts and ulceration of the lips, muzzle, nose, tongue, ear...

May 26, 2026Equine Herpesvirus-RespiratoryLewis County, WA. Alert ID: 5011Confirmed Case: Voluntary Quarantine Source: A...
05/26/2026

May 26, 2026
Equine Herpesvirus-Respiratory
Lewis County, WA.
Alert ID: 5011
Confirmed Case: Voluntary Quarantine
Source: Asst. State Veterinarian-WSDA
Number Confirmed: 1;
Number Exposed: Unknown;
Facility Type: Private Facility;
Comments: Delayed reporting. Horse was under vet care and managed.;

For more information, go to

Equine herpesvirus (EHV) is a family of equine viruses named by numbers including EHV-1, 2, 3, 4 and 5 with EHV-1,3,4 posing the most risk for domestic horses. EHV is a common DNA virus that occurs in horse populations worldwide. The two most common species are EHV-1 and EHV-4.

May 23, 2026StranglesLane County, ORAlert ID: 5010Confirmed Case(s) - Official QuarantineSource: State Department of Ag...
05/23/2026

May 23, 2026
Strangles
Lane County, OR
Alert ID: 5010
Confirmed Case(s) - Official Quarantine
Source: State Department of Agriculture

Number Confirmed: 1;
Number Exposed: Unknown

The upper respiratory disease commonly referred to as strangles is caused by Streptococcus equi subsp equi. Strangles is spread from horse to horse through direct contact. Horses can also contract the disease by coming into contact with contaminated surfaces. The disease is highly infectious.

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