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Disease 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.



Carroll County, MD
Outbreak Identifier: 6685
Alert ID: 4163
December 19, 2024
Confirmed Case(s) - No Quarantine

Attending veterinarian

Number Confirmed: 3; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 3; Gender: Filly; Breed: Quarter Horse (QH); Usage: Reining; Onset of Clinical Signs: 12/7/2024; Clinical Signs: Fever, cough, nasal discharge; Confirmation Date: 12/16/2024; Horse Status: Affected And Alive; Vaccination Status: Vaccinated;

Horse 2: 
Age: 1; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Reining; 

Horse 3: 
Age: 2; Gender: Colt; Breed: Quarter Horse (QH); Usage: Reining; 

Comments: The index case began showing clinical signs while in Oklahoma, was shipped to Woodbine, MD, and is currently in St. Thomas PA.;

Franklin County, PA
Outbreak Identifier: 6684
Alert ID: 4162
December 19, 2024
Confirmed Case(s) - No Quarantine

Attending veterinarian

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: Unknown; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: Weanling; Gender: Colt; Breed: Miniature Horse; Onset of Clinical Signs: 12/15/2024; Clinical Signs: Nasal discharge, lymphadenopathy; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Comments: The horse was originally purchased from a public auction. The horse is also positive influenza on nasal swab PCR. 

Warren County, VA
Outbreak Identifier: 6683
Alert ID: 4161
December 19, 2024
Confirmed Case(s) - Voluntary Quarantine

Attending Veterinarian

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: Horse recently purchased from an auction with unknown vaccination history;

Lewis County, WA
Outbreak Identifier: 6681
Alert ID: 4160
December 18, 2024
Confirmed Case(s) - No Quarantine

State Veterinarian Office and Attending Veterinarian

Number Confirmed: 1; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: Horse is alive and under vet care.;

County of Lennox and Addington, ON
Outbreak Identifier: 6680
Alert ID: 4158
December 16, 2024
Confirmed Case(s) - Voluntary Quarantine

OMAFA

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 16; Breed: Donkey; Clinical Signs: Cough and nasal discharge.; Confirmation Date: 12/14/2024; Horse Status: Recovering; Vaccination Status: Unvaccinated;

District of Parry Sound, ON
Outbreak Identifier: 6679
Alert ID: 4157
December 16, 2024
Confirmed Case(s) - Voluntary Quarantine

OMAFA

Number Confirmed: 1; 
Number Exposed: 5; 
Facility Type: Boarding Facility; 

Horse 1: 
Age: 16; Gender: Gelding; Breed: Quarter Horse (QH); Clinical Signs: Lethargy , anorexia, abnormal respiratory sounds.; Confirmation Date: 12/9/2024; Horse Status: Recovering; 

Comments: The farm owner is working with their veterinarian on voluntary animal movement restrictions and biosecurity. To see past and present Strangles cases in Ontario go to: https://www.oahn.ca/resources/ontario-equine-disease-alerts/ and enter the disease surveillance portal.;

Orange County, FL
Outbreak Identifier: 6263
Alert ID: 4156
December 16, 2024
Confirmed Case(s) - Official Quarantine

Animal and Plant Health Inspection Service of the United States Department of Agriculture

Number Confirmed: 50; 
Number Exposed: 86; 
Comments: For more information, please see https://www.aphis.usda.gov/livestock-poultry-disease/equine/contagious-equine-metritis


Previous Alerts: 4102, 4052, 4004, 3978, 3893, 3859, 3815, 3805, 3776, 3748, 3741, 3732

Mahoning County, OH
Outbreak Identifier: 6665
Alert ID: 4155
December 13, 2024
Quarantine Released

Racing Manager

Number Confirmed: 1; 
Number Exposed: 75; 
Facility Type: Racetrack; 
Comments: All horses in Barn 4 were rested for Strangles via PCR and all horses tested negative. As a result, Hollywood Gaming at Mahoning Valley Race Course will be lifting the quarantine mandate of Barn 4 effective Dec. 13. The track will return to regularly scheduled training hours. Effective immediately, the racetrack will begin enforcing the following: Any trainer stabled in Barn 4 or shipping into Barn 4 must provide a negative strangles PCR test within 5 days prior to arrival. This requirement is in addition to the already required health certificates, proof of vaccinations and Coggins (as outlined in the stall application and condition book). This requirement will be in place for a minimum of 30 days.; 
Previous Alerts: 4141

Canyon County, ID
Outbreak Identifier: 6678
Alert ID: 4154
December 13, 2024
Outbreak Update

Private Practitioner Veterinarian

Number Confirmed: 2; 
Number Exposed: 3; 
Facility Type: Private Facility; 

Horse 1: 
Age: 4; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Pleasure Riding; Onset of Clinical Signs: 12/5/2024; Clinical Signs: Mild fever (101.7*F), purulent discharge from submandibular lymph node, ventral jaw swelling, reduced appetite; Confirmation Date: 12/9/2024; Horse Status: Recovering; Vaccination Status: Unvaccinated;

Ada County, ID
Outbreak Identifier: 6677
Alert ID: 4153
December 13, 2024
Confirmed Case(s) - Voluntary Quarantine

Private Practitioner Veterinarian

Number Confirmed: 1; 
Number Suspected: 1; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 

Horse 1: 
Age: 20; Gender: Gelding; Breed: Pony; Usage: Companion; Onset of Clinical Signs: 12/3/2024; Clinical Signs: Mild fever (102.3*F), decreased appetite, purulent discharge from left nostril, moderate swelling of the left throat latch, reluctance to move head/neck to the left side; Confirmation Date: 12/12/2024; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;