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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.


June 17, 2018
Strangles
Shelby County, TN
Confirmed Case(s): Voluntary Quarantine
Source: Attending Veterinarian

On May 3, 2018, the attending veterinarian confirmed Strangles in a private facility in in Shelby County, Tennessee. Four horses (8 and 9-year old geldings, 7-year old mare, and 2-year old mini gelding) had clinical signs of high fevers, draining submandibular lymph nodes, coughing and nasal drainage. All four horses are alive and under voluntary quarantine until they are confirmed negative for the disease.

June 15, 2018
Strangles
Washtenaw County, MI
Confirmed Case(s): No Quarantine
Source: Michigan Department of Agriculture and Rural Development

The Michigan Department of Agriculture and Rural Development has confirmed strangles in two horses from Washtenaw County. The horses are from separate premises and there is no known link between the two cases at this time. One of the cases is a three-month-old paint colt that developed nasal discharge and swollen submandibular glands. The other case is a 29-year-old American Saddlebred stallion. The status of the horses is unknown and no quarantines were placed by the Department. This brings the total number of strangles cases confirmed in Michigan in 2018 to five.

June 13, 2018
Equine Herpes Viruses
King County, WA
Confirmed case(s): Official Quarantine
Source: Washington State Veterinarian Office

The Washington State Veterinarian’s Office received a report of a positive Equine Herpes Virus 1 non-neurogenic (wild type) strain in a single horse in King County. The horse is in isolation and the facility is currently under quarantine. Strict equine biosecurity is in place.

 

June 13, 2018
Equine Infectious Anemia
Wilson, Kaufman, and Dallas Counties, TX
Confirmed case(s): Official Quarantine
Source: Texas Animal Health Commission

Texas Animal Health Commission (TAHC) officials confirmed Equine Infectious Anemia (EIA) in two Wilson County Quarter Horses, two Kaufman County Quarter Horses and one Dallas County Quarter Horse. The Wilson and Dallas county horses have been euthanized, all exposed horses are being tested, and all premises will remain under quarantine until requirements for release have been met. The Kaufman County horses are currently being maintained on the quarantined premises and the premises will remain under quarantine until requirements for release have been met. 

June 13, 2018
Equine Infectious Anemia
Bastrop County, TX
Outbreak Update
Source: Texas Animal Health Commission

On March 8, 2018, Texas Animal Health Commission reported a confirmed EIA case in Bastrop County to the EDCC. Since that time, two additional horses from the quarantined premises have been confirmed positive for EIA. The positive horses have been euthanized and the premises will remain under quarantine until requirements for release have been met.

June 08, 2018
Equine Herpes Viruses
York County, ME
Quarantine Released
Source: Maine State Veterinarian's Office

On Friday, June 8, 2018, the Office of the Maine State Veterinarian released the quarantine of a private facility in York County, Maine. The facility had been in quarantine since May 15, 2018 after a Standardbred mare was confirmed to have Equine Herpesvirus Myeloencphalopathy (EHM). The index case was euthanized. No other horses have been affected.

June 07, 2018
Equine Infectious Anemia
Josephine County, OR
Quarantine Released
Source: Office of the Oregon State Veterinarian

On June 1 the USDA National Veterinary Services Laboratory (NVSL) confirmed the presumptive positive Equine Infectious Anemia (EIA) status of a seven-year-old Quarter Horse tested by the Oregon Department of Agriculture Animal Health Laboratory. The positive horse was detected by routine testing and did not show any clinical signs of disease. The positive horse had been housed at the Grants Pass Downs located on the Josephine County Fairgrounds. A quarantine was placed on the facility and an epidemiological investigation by an ODA staff veterinarian was conducted. It was determined that there were 37 at-risk horses stabled with the positive horse. Additionally, the investigation discovered another 20 at-risk horses located on three farms in the area. Samples from all 57 horses were collected and submitted to NVSL to determine if any of the at-risk horses were infected with the disease. There was no record of recent interstate travel by any of the at-risk horses. The testing results from the 57 at-risk horses were received Thursday afternoon (June 7) and all horses tested negative. The positive horse was humanely euthanized and removed from the Fairgrounds area on Tuesday June 6. The quarantine that was placed on the Josephine County Fairgrounds has been lifted.

June 06, 2018
Potomac Horse Fever
Bourbon County, KY
Confirmed Case(s): No Quarantine
Source: Kentucky State Veterinarian's Office

On Tuesday, June 5, 2018, the Kentucky State Veterinarian’s Office confirmed a case of Potomac Horse Fever in Bourbon County. A 2017 Thoroughbred filly presented on Tuesday, May 29, 2018 with acute watery diarrhea of 48-hour duration, dehydration, and had been febrile. PCR testing of whole blood and feces confirmed the diagnosis of Potomac Horse Fever. Treatment was begun on Tuesday, June 5, 2018. The filly appeared much improved and is expected to make a full recovery. This is Kentucky’s second confirmed case of Potomac Horse Fever in 2018. Investigations support no direct correlation or relationship between the previous case identified on June 1, 2018.

June 04, 2018
Potomac Horse Fever
Bourbon County, KY
Confirmed Case(s): No Quarantine
Source: Kentucky State Veterinarian's Office

On Friday, June 1, 2018, the Kentucky State Veterinarian's office confirmed a case of Potomac Horse Fever in Bourbon County. A 4-year-old Thoroughbred filly in Bourbon County, Kentucky that presented with profuse and watery diarrhea, lethargy, and a fever of 104 ° F is hospitalized in isolation. Fecal PCR testing confirmed the presence of Potomac Horse Fever. Symptoms began to resolve over the weekend following treatment. On Monday, June 4, 2018, the patient is described as significantly improved with a favorable prognosis. This is Kentucky's first confirmed case of Potomac Horse Fever in 2018. For more information on Potomac Horse Fever, please visit https://aaep.org/sites/default/files/Documents/PotomacHorseFever_Final.pdf .

June 01, 2018
Equine Infectious Anemia
Josephine County, OR
Confirmed case(s): Official Quarantine
Source: Oregon Department of Agriculture

The Oregon Deptartment of Agriculture Animal Health Laboratory detected a presumptive positive Equine Infectious Anemia (EIA) horse during routine Coggins testing on Tuesday, May 29, 2018. Confirmatory testing by the USDA National Veterinary Services Laboratory (NVSL) is in progress. ODA is proceeding with preliminary disease control actions. The presumptive positive horse is a seven year old Quarter Horse mare currently housed at the Grants Pass Downs on the Josephine County Fairgrounds. A quarantine has been issued and follow-up tracing and testing for high-risk contact horses is underway. The presumptive positive horse originates from a farm in southern Oregon. There is no known history of interstate travel at this point in time. There has been excellent cooperation with owners, facility managers and other officials. Updates will be provided as the investigation progresses.