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EDCC September 2026 Statistics
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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.



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Equine Herpesvirus- Respiratory
Howard County, MD
Outbreak Identifier: 7714
Type: EHV-4
Alert ID: 5290
October 05, 2026
Confirmed Case(s) - Voluntary Quarantine

Maryland Department of Agriculture

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: 25; 
Facility Type: Horse Rescue; 

Horse 1: 
Age: 1; Gender: Gelding; Breed: Belgian; Usage: Rescue; Onset of Clinical Signs: 10/1/2026; Confirmation Date: 10/2/2026; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;
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Equine Herpesvirus- Respiratory
Howard County, MD
Outbreak Identifier: 7713
Type: EHV-1
Alert ID: 5289
October 05, 2026
Confirmed Case(s) - Voluntary Quarantine

Maryland Department of Agriculture

Number Confirmed: 1; 
Number Suspected: Unknown; 
Number Exposed: Unknown; 
Facility Type: Horse Rescue; 

Horse 1: 
Age: 16; Gender: Gelding; Breed: Tennessee Walking Horses; Usage: Rescue; Onset of Clinical Signs: 9/25/2026; Confirmation Date: 9/30/2026; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;
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Equine Herpesvirus- Respiratory
Baltimore County, MD
Outbreak Identifier: 7695
Type: EHV-1
Alert ID: 5271
September 24, 2026
Investigation Initiated

Maryland Department of Agriculture

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

Horse 1: 
Age: 4; Gender: Mare; Breed: Warmblood (WB); Usage: Horse Show; Onset of Clinical Signs: 9/20/2026; Confirmation Date: 9/22/2026; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;
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Equine Herpesvirus- Respiratory
Green Lake County, WI
Outbreak Identifier: 7645
Type: EHV-4
Alert ID: 5220
September 10, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: 13; Gender: Gelding; Breed: Mustang; Clinical Signs: Fever; Confirmation Date: 8/26/2026; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;
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Equine Herpesvirus- Respiratory
Calumet County, WI
Outbreak Identifier: 7594
Type: EHV-4
Alert ID: 5167
August 26, 2026
Confirmed Case(s) - Voluntary Quarantine

Wisconsin Department of Agriculture, Trade and Consumer Protection

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: 4; Gender: Gelding; Breed: Quarter Horse (QH); Clinical Signs: Fever, an incidental finding during a wellness exam;
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