Source:
USDA-APHIS-Veterinary Services
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