Disease Alerts

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.;

Number Confirmed: 1; 
Facility Type: Private Facility; 

Horse 1: 
Age: 3; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 7/6/2026; Confirmation Date: 7/9/2026; Horse Status: Recovering; Vaccination Status: Unvaccinated;

Number Suspected: 1; 
Facility Type: Private Facility; 

Horse 1: 
Age: 5; Gender: Gelding; Breed: Morgan; Onset of Clinical Signs: 6/20/2026; Clinical Signs: bilateral nasal discharge, open and draining mandibular lymph nodes, fever: 104 degrees F; Horse Status: Recovering; Vaccination Status: Unvaccinated;

Comments: Presumptive diagnosis based on veterinarian's experience. Horse came from a rescue in Southern WI and had these symptoms when it was picked up by owner.;

Comments: Since the last VSV situation report (7/7/2026), 2 new confirmed positive equine premises have been identified, 1 in Archuleta County and 1 in La Plata County, Colorado (both new affected counties). Additionally, 1 new VSV-presumptive positive equine premises has been quarantined in Valencia County, New Mexico. All confirmed cases in the 2025-26 outbreak have been vesicular stomatitis New Jersey virus (VSNJV) serotype. 

Updates are as follows: Colorado • Archuleta County (New Affected County) – 1 new confirmed positive equine premises • La Plata County (New Affected County) – 1 new confirmed positive equine premises.

Since the last situation report (7/7/2026), 1 previously VSV-affected premises in Montrose County has been released from quarantine New Mexico • Valencia County – 1 new presumptive positive equine premises • Since the last situation report (7/7/2026), 1 previously VSV-affected premises in Rio Arriba County has been released from quarantine. Since the start of the outbreak, 35 VSV-affected premises have been identified (27 confirmed positive, 8 presumptive positive) in 3 states, Arizona, Colorado, and New Mexico. All 35 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), 4 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). Since the start of the outbreak, 35 VSV-affected premises have been identified (27 confirmed positive, 8 presumptive positive) in 3 states, Arizona, Colorado, and New Mexico. All 35 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), 4 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 Suspected: 5; 
Number Exposed: Unknown; 
Facility Type: Private Facility; 
Comments: Horse imported from Colorado on July 12. Under veterinary care and recovering.;

Number Suspected: Unknown; 
Number Exposed: Unknown; 
Number Euthanized: 1; 
Comments: The infected horse was euthanized on 07/16/2026, but the other horses at the facility will remain under quarantine until a sixty day retest is conducted and they are found negative per WSDA and USDA program requirements.; 
Previous Alerts: 5061

Number Confirmed: 2; 
Number Suspected: Unknown; 
Number Exposed: 16; 
Number Euthanized: 2; 
Facility Type: Private Facility; 
Comments: This was an epidemiological link to an EIA infected premises in Pierce County (previous EDCC alert 5048). Eighteen (18) horses at the location were tested for EIA and Piroplasmosis by state animal health officials. Two (2) horses at the location were reported positive for EIA on 7/17/2026 from NVSL. The positive horses have been euthanized, but the quarantine will remain in place until a sixty day retest is conducted and they are found negative per WSDA and USDA program requirements.;

Number Confirmed: 1; 
Number Exposed: Unknown; 

Horse 1: 
Age: 5; Gender: Mare; Breed: Quarter Horse (QH); Clinical Signs: Lethargy, fever; Confirmation Date: 7/7/2026; Horse Status: Affected And Alive; Vaccination Status: Unvaccinated;

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