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2019 Annual Report

Source: Equine Disease Communication Center | 01/21/2020 10:55:00 AM The Equine Disease Communication Center posted 414 alerts reporting on 963 horses or in the case of vesicular stomatitis, the number of premises affected. Click here to view...

EDCC August 2023 Statistics

Outbreak summary for August 1-31, 2023 138 alerts posted reporting on 152 horses Disease State Confirmed Eastern Equine Encephalitis 21 cases Florida 3 Georgia 1 New York 4 North Carolina 5 Ontario 5 South Carolina 3 Equine Herpesvirus- Respiratory...

EDCC July 2023 Statistics

Outbreak summary for July 1-31, 2023 42 alerts posted reporting on 45 horses Disease Confirmed Eastern Equine Encephalitis 6 cases Florida 2 Georgia 4 Equine Herpesvirus- Neurologic 2 cases Florida 1 Nevada 1 Equine Infectious Anemia 7 cases...

EDCC November 2023 Statistics

Outbreak Summary for November 1-30, 2023 44 alerts posted, reporting on 41 horses. Disease State Confirmed Eastern Equine Encephalitis 3 Cases Florida 2 Quebec 1 Equine Herpesvirus- Neurologic 5 Cases Maine 2 Nova Scotia 1 Ontario 2 Equine...

EDCC September 2023 Statistics

Outbreak summary for September 1-30, 2023 113 alerts posted reporting on 162 horses Disease State Confirmed Eastern Equine Encephalitis 16 cases Georgia 1 Maine 1 Michigan 1 New Jersey 1 New York 2 North Carolina 1 Ontario 7 Quebec 1...

Infectious Diseases

Infectious disease in horses is caused by a specific MICROBIAL agent such as a bacteria, viruses, or parasites. When left untreated, infectious disease can spread rapidly in groups of horses. Use the table below to learn more about a specific...

Vesicular Stomatitis

What is Vesicular Stomatitis? Vesicular stomatitis is a viral disease of horses, donkeys, mules, cattle, swine and New World camelids that occurs in the Western Hemisphere. The disease is named for the characteristic vesicular lesions it causes in...

Vesicular Stomatitis Confirmed in Arizona

Vesicular Stomatitis Confirmed in Arizona Two cases of vesicular stomatitis New Jersey Virus (VSNJV) have been confirmed in Cochise County, AZ. The cases were confirmed positive by the National Veterinary Services Laboratories on Oct. 31 and were...


Disease Alerts

Alert ID: 4965

Source: Animal and Plant Health Inspection Service of the United States Department of Agriculture | 6/26/2026

Comments: Since the last VSV situation report (6/12/2026), five (5) new VSV-affected equine premises (1 confirmed positive, 4 presumptive positive) have been quarantined in New Mexico. All confirmed cases in the 2025-26 outbreak have been vesicular...

Alert ID: 4950

Source: USDA-APHIS-Veterinary Services | 6/16/2026

Comments: Since the last VSV situation report (6/10/2026), four (4) new VSV-affected equine premises have been confirmed positive in Valencia County, New Mexico (New Affected County). All confirmed cases in the 2025-26 outbreak have been vesicular...

Alert ID: 4947

Source: USDA-APHIS-Veterinary Services | 6/10/2026

Comments: Since the last VSV situation report (5/26/2026), one new VSV-affected equine premises has been confirmed positive in Santa Fe County, New Mexico (New Affected County). All confirmed cases in the 2025-26 outbreak have been vesicular...

Alert ID: 4924

Source: USDA-APHIS-Veterinary Services | 5/26/2026

Comments: On May 22, 2026, the National Veterinary Services Laboratories (NVSL) in Ames, Iowa, confirmed vesicular stomatitis New Jersey virus (VSNJV) on an equine premises in Sandoval County, New Mexico. One (1) horse out of 3 horses on the...

Alert ID: 4910

Source: USDA-APHIS Veterinary Services | 5/8/2026

Comments: Since the start of the outbreak,16 VSV-affected premises have been identified (16 confirmed positive, 0 presumptive positive) in 2 states, Arizona and Colorado. All 16 premises have had only equine species clinically affected in six...

Alert ID: 4853

Source: USDA-APHIS Veterinary Services | 4/7/2026

Comments: Since the last situation report (3/4/2026), there have been two (2) new confirmed VSV-positive equine premises identified in Arizona (Yavapai County). All confirmed cases in the 2025-26 outbreak have been vesicular stomatitis New Jersey...

Alert ID: 4814

Source: Animal and Plant Health Inspection Service of the United States Department of Agriculture | 3/4/2026

Comments: Since the last situation report (2/26/2026), there has been one (1) new confirmed VSV positive equine premises identified in Arizona (Yavapai County). All confirmed cases in the 2025-26 outbreak have been vesicular stomatitis New Jersey...

Alert ID: 4805

Source: Animal and Plant Health Inspection Service of the United States Department | 2/26/2026

Comments: Since the last situation report (2/23/2026), there has been one (1) new confirmed VSV positive equine premises identified in Arizona (Yavapai County – new affected county). All confirmed cases in the 2025-26 outbreak have been vesicular...

Alert ID: 4796

Source: Animal and Plant Health Inspection Service of the United States Department of Agriculture | 2/19/2026

Comments: Since the last situation report (1/27/2026), there has been one (1) new confirmed VSV positive equine premises identified in Arizona (Maricopa County). All confirmed cases in the 2025-26 outbreak have been vesicular stomatitis New Jersey...

Alert ID: 4760

Source: Animal and Plant Health Inspection Service of the United States Department of Agriculture | 1/27/2026

Comments: Since the last situation report (1/9/2026), there has been one (1) new confirmed VSV positive equine premises identified in Arizona (Maricopa County). All confirmed cases in the 2025-26 outbreak have been vesicular stomatitis New Jersey...