Disease Alerts

Number Confirmed: 1; 
Number Exposed: 2; 

Horse 1: 
Age: 20; Gender: Mare; Breed: Paint; Clinical Signs: Submandibular abscessation; Confirmation Date: 7/25/2026; Horse Status: Affected And Alive; Vaccination Status: Status Unknown;

Comments: Affected horse came from a rescue;

Number Confirmed: 2; 
Number Exposed: 1; 
Number Euthanized: 2; 
Comments: A confirmed EIA positive equid must be euthanized or quarantined for life 200 yards away from any EIA negative equid as per USDA EIA program rules. Euthanasia was elected for these cases and was witnessed by CDFA veterinarians on May 20th. The one (1) potentially exposed horse on this premises tested negative on the sixty (60) day retest. Quarantine on this premises has been released.; 
Previous Alerts: 4994

Number Confirmed: 6; 
Number Exposed: 7; 
Number Euthanized: 6; 
Comments: A confirmed EIA positive equid must be euthanized or quarantined for life 200 yards away from any EIA negative equid as per USDA EIA program rules. Euthanasia was elected for these cases and was witnessed by CDFA veterinarians on May 18th. The seven (7) potentially exposed horse on this premises tested negative on the sixty (60) day retest. Quarantine on this premises has been released.; 
Previous Alerts: 4993

Number Confirmed: 1; 
Number Exposed: 9; 

Horse 1: 
Gender: Gelding; Breed: Quarter Horse (QH); Onset of Clinical Signs: 6/11/2026; Clinical Signs: Nasal discharge, facial swelling; Horse Status: Recovering; Vaccination Status: Status Unknown;

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

Horse 1: 
Age: 6; Gender: Gelding; Breed: Quarter Horse (QH); Usage: Rodeo; Onset of Clinical Signs: 7/23/2026; Clinical Signs: Fever, ocular and nasal discharge, cough; Confirmation Date: 7/24/2026; Horse Status: Quarantined; Vaccination Status: Unvaccinated;

Comments: Horse tested positive for both Influenza and Strangles.;

Comments: Since the last VSV situation report (7/20/2026), 2 new presumptive positive equine premises have been quarantined, 1 in Archuleta County and 1 in Montezuma County, Colorado. All confirmed cases in the 2025-26 outbreak have been vesicular stomatitis New Jersey virus (VSNJV) serotype. 

Updates are as follows: Colorado • Archuleta County – 1 new presumptive positive equine premises • Montezuma County – 1 new presumptive positive equine premises New Mexico • VSV-affected premises remain quarantined in Rio Arriba County and Valencia County, New Mexico 

Since the start of the outbreak, 37 VSV-affected premises have been identified (27 confirmed positive, 10 presumptive positive) in 3 states, Arizona, Colorado, and New Mexico. All 37 premises have had only equine species clinically affected with 15 premises located in 6 Arizona counties (Cochise, Gila, Maricopa, Pinal, Santa Cruz, and Yavapai Counties), 6 premises located in 4 Colorado counties (Archuleta, La Plata, Montezuma, and Montrose Counties), and 16 premises located in 4 New Mexico counties (Rio Arriba, Sandoval, Santa Fe, and Valencia Counties).;

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

Number Confirmed: 1; 
Number Exposed: 4; 
Facility Type: Private Facility; 
Comments: This is the 18th confirmed case of strangles for Florida in 2026.;

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

Horse 1: 
Age: 2; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 7/3/2026; Clinical Signs: Single submandibular abscess (open/draining), lethargy, reduced appetite; Confirmation Date: 7/8/2026; Horse Status: Recovered; Vaccination Status: Status Unknown;

Number Confirmed: 1; 
Number Suspected: 2; 
Facility Type: Private Facility; 

Horse 1: 
Age: 6; Gender: Mare; Breed: Miniature Horse; Onset of Clinical Signs: 6/9/2026; Confirmation Date: 6/16/2026; Horse Status: Recovering; Vaccination Status: Unvaccinated;

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

Horse 1: 
Age: 16; Gender: Gelding; Breed: Belgian; Onset of Clinical Signs: 7/12/2026; Confirmation Date: 7/17/2026; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

Comments: Horse came from a Southern WI rescue and arrived at new owner premises with symptoms of strangles.;