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Disease Outbreak Alerts

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.

March 15, 2019
Clark County, NV
Confirmed case(s): Official Quarantine
Source: Nevada Department of Agriculture

Number Affected: 1;
Clinical Signs: Neurological Signs 
Notes: Horses at the Nevada State/Junior/High School Rodeo that took place in Pahrump may have been exposed to the virus and should be monitored for signs of disease such as fever, cough or runny nose. For more information go to:

March 13, 2019
Equine Infectious Anemia
Transylvania County, NC
Suspected Case(s): Official Quarantine
Source: North Carolina Department of Agriculture and Consumer Services

Number Affected: 1;

Breed: Mule; Horse Status: Euthanized;
Notes: The mule displayed clinical signs and at necropsy had histopathological changes consistent for EIA. Additional blood from the animal was not available for testing for EIA, so out of an abundance of caution the case is considered presumptive positive by animal regulatory health officials. The remaining equids at the facility were tested and were negative for EIA and will be observed and retested in 60 days.

March 13, 2019
Equine Herpesvirus
St. Lawrence and Livingston Counties, NY
Confirmed case(s): Official Quarantine
Source: New York Department of Agriculture and Markets

Number Affected: Not Reported;
Notes: The New York Department of Agriculture and Markets is investigating cases of Equine Herpesvirus-1 at St. Lawrence University’s horse boarding facility in St. Lawrence County and Leg Up Stables, which is home to SUNY Geneseo’s Equestrian Team in Livingston County. The stables are working closely with the Department and have voluntarily quarantined their animals and proactively instituted biosafety measures.

For more information go to

March 11, 2019
Equine Influenza
Williamson County, TN
Confirmed case(s): Official Quarantine
Source: Tennessee Department of Agriculture

Number Affected: 4;
Notes: The Tennessee Department of Agriculture has confirmed that four horses returning from out-of-state events have tested positive for equine influenza virus (EIV) in Tennessee. All of those horses are from Williamson County in Middle Tennessee, but they are not all from the same barn. They all have been isolated to prevent further spreading of EIV. For more information go to


March 07, 2019
Miami Animal Import Center, FL
Information Only
Source: Animal and Plant Health Inspection Agency

After completing a thorough cleaning and disinfection, USDA’s Animal and Plant Health Inspection Service (APHIS) will partially reopen the Miami Animal Import Center’s (MAIC) horse quarantine facility on March 11, 2019. On January 19, 2019, the facility was closed to new arrivals, after eight horses became sick between December 17, 2018, and January 25, 2019. All eight showed signs of lameness and received immediate medical treatment. Four of the horses died and the other four recovered. On January 16, 2019, APHIS announced the temporary closure of the MAIC as a precautionary measure, but horses under quarantine were allowed to complete their stay at the facility. At the time, veterinary experts suspected salmonella as the cause of illness, however, subsequent testing has not identified any causative disease agent present in the Center. APHIS officials took more than 180 environmental samples at the facility and all were negative for salmonella. In addition, affected animals were tested for a variety of diseases, such as E. coli, Equine Influenza, Equine Herpesvirus, Aeromonas caviae, Torovirus, Coronavirus, Lawsonia intracellularis, Neorickettsia risticii, and Clostridium ssp and toxins. The tests did not pin point the causative agent.

March 06, 2019
Equine Herpesvirus
Snohomish County, WA
Confirmed Case(s): Voluntary Quarantine
Source: Washington Department of Agriculture

Number affected:1

Age: 11; Gender: Gelding; Breed: Warmblood (WB); Onset of Clinical Signs: 3/1/2019;
Clinical Signs: intermittent fever; Confirmation Date: 3/5/2019; Horse Status: Recovering; Vaccination Status: Vaccinated;

March 05, 2019
Middlesex County, CT
Confirmed Case(s): No Quarantine
Source: Attending Veterinarian

Number Affected: 1

Age: Yearling; Gender: Mare; Clinical Signs: Inappetance, lethargy, Draining Submandibular Lymph Nodes;

Notes: One horse at a private facility in Middlesex County has been confirmed positive for Strangles. No quarantines have been put in place.

February 28, 2019
Augusta County, VA
Ongoing Investigation
Source: Attending Veterinarian

Number Affected: 1;
Age: 6; Gender: Gelding; Breed: Thoroughbred (TB); Onset of Clinical Signs: 2/12/2019;
Clinical Signs: Fever, Submandibular Abcess; Horse Status: Euthanized;
Notes: Horse has been located on farm for 5 weeks, was a new arrival.


February 28, 2019
Equine Infectious Anemia
Municipality of Meadow Lake, SK
Confirmed case(s): Official Quarantine
Source: Canadian Animal Health Surveillance System

Number Affected: 5;
Notes: On February 22, 2019, positive EIA results were confirmed by the CFIA’s national reference laboratory for four horses located on a premises in the rural municipality of Meadow Lake, Saskatchewan. The horses were epidemiologically linked to a previously identified case in Alberta, and were sampled by the CFIA as part of an ongoing disease investigation. An additional positive result was reported on February 26, 2019, for an epidemiologically linked animal, which was exhibiting clinical signs of disease. All of the infected horses have the same owner, but one animal currently resides on a separate premises. As per program policy, a quarantine has been placed on the infected animals and the on-premises contact animals. The quarantine will remain until all disease response activities have been completed, including follow-up testing and ordering the destruction of positive cases. Trace-out activities may require the CFIA to undertake actions at additional premises as outlined in the current policy. For more information go to

February 27, 2019
Equine Infectious Anemia
Lamar and Paulding Counties, GA
Quarantine Released
Source: Georgia Department of Agriculture

Notes: The Georgia Department of Agriculture’s (GDA) Animal Industry Division has updated information on the cases of Equine Infectious Anemia (EIA) discovered in Lamar County and Paulding County in 2018. The Department has released the quarantines on one remaining premise in Lamar County and one premise in Paulding County after follow up testing revealed no additional cases. There are no EIA-related quarantines in place in either county at this time.