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Disease Outbreak 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.


Date Disease Location Status
May 19, 2017 Equine Infectious Anemia Weld County, CO Confirmed case(s): Quarantine
Source: State Veterinarian's Office, Colorado

Three horses out of 9 horses exposed in Weld County, Colorado tested positive for Equine Infectious Anemia (EIA). Six horses are now quarantined. None of the horses testing positive had clinical signs of the disease. For more info go to: https://www.colorado.gov/pacific/agmain/news/582017-eia-positive-horse-identified-colorado

May 09, 2017 Equine Infectious Anemia Weld County, CO Confirmed case(s): Quarantine
Source: State Veterinarian's Office, Colorado

Based on a test at the  National Veterinary Services Laboratory, a 5-year old racing quarter horse in Fort Lupton, Colorado was diagnosed with Equine Infectious Anemia (EIA). The mare was asymptomatic and was euthanized. The stable with a total of 18 horse is quarantined restricting movement of horses for 60 days. For more information go to: https://www.colorado.gov/pacific/agmain/news/582017-eia-positive-horse-identified-colorado  and for information on EIA go to http://www.aphis.usda.gov/vs/nahss/equine/eia/eia_info_sheet.pdf

May 09, 2017 Equine Herpes Viruses Mesa County, CO Confirmed case(s): Quarantine
Source: Office of the State Veterinarian, Colorado

A 17-year old quarter horse mare used for barrel racing was diagnosed with Equine Herpesvirus myeloencephalopathy (EHM) in Grand Junction,  Mesa County, Colorado. The mare is recovering from urinary incontinence and hindlimb ataxia. The premises with a total of 10 horses is quarantined with restricted movement and all horses having temperatures taken twice daily. As of this date no further horses have shown signs of the disease. For more information on EHM go to: https://aaep.org/sites/default/files/Documents/DiseaseFactsheetEHM.pdf

May 05, 2017 Equine Herpes Viruses Sacramento County, CA Quarantine Released
Source: California Department of Food and Agriculture

Since the removal of the 15-year-old Warmblood mare previously diagnosed with Equine Herpesvirus Myeloencephalopathy on April 21, 2017, no additional cases have been identified at the Sacramento County premises. On May 5, 2017 the premises was released from quarantine. Currently there are no quarantines for Equine Herpesvirus in the state of California.

May 04, 2017 Strangles Golden, CO Confirmed case(s): Quarantine

Fifty eight horses and 28 ponies out of a herd of 230 at Fort Westernaires in Jefferson County, Colorado have been diagnosed with Strangles. All horses in the herd are quarantined and the affected horses are being treated. The Jefferson County Fairgrounds is not quarantined.

April 28, 2017 Equine Herpes Viruses Sacramento, CA Confirmed case(s): Quarantine
Source: California Department of Food and Agriculture

April 28, 2017: A 15 year old Warmblood mare in Sacramento County displaying severe neurologic signs was confirmed positive for Equine Herpesvirus-1 (EHV-1). The mare initially showed  signs of colic on Friday April 21st and was transported to a veterinary clinic for veterinary care. While in isolation at the veterinary clinic, the mare started displaying neurologic signs, became recumbent and was subsequently euthanized. Quarantine was immediately implemented at the home premises. Because this horse meets the case definition for an Equine Herpesvirus Myeloencephalopathy (EHM)  CDFA issued a quarantine for 31 exposed horses which requires implementation of biosecurity measures including twice daily temperature taking and clinical observation of the horses. No exposed horses have displayed signs of disease. CDFA continues to monitor the situation onsite. Go to https://www.cdfa.ca.gov/ahfss/animal_health/equine_herpes_virus.html

April 26, 2017 Strangles Monroe County, FL Confirmed Case(s): No Quarantine
Source: Florida Department of Agriculture and Consumer Services

On April 26, one premise in Monroe County, Florida was placed under quarantine for clinical signs and positive PCR for strangles.  The index case became clinical on April 19,  no horses have left the premises since clinical signs began. This the seventh case for Monroe County and case 18 for Florida in 2017.

April 21, 2017 Equine Herpes Viruses Somerset and Hunterdon Counties, NJ Quarantine Released
Source: New Jersey Department of Agriculture

On April 4, 2017, New Jersey reported the first case of neurologic Equine Herpes Virus-1 (EHV-1) for the year.  The index horse and 14 exposed horses were quarantined on March 31, 2017 at the index farm in Somerset County and a veterinary hospital in Hunterdon County after receiving positive PCR results for EHV-1 in a neurologic horse.  No recent travel occurred at the index farm in Somerset County.  On April 4, 2017, seven of the nine horses housed in the main building at the veterinary hospital were relocated to a remote facility in Hunterdon County, which was subsequently quarantined as well.  This allowed the hospital to clean and disinfect their  main building before re-opening on April 8, 2017.  The index horse remained in isolation at the hospital to continue receiving treatment.  Temperatures were taken twice daily for 21 days at all three quarantined facilities while following strict biosecurity protocols.  The index horse has received treatment and is recovering.  The index horse and exposed horses were released from quarantine today after 21 days of intense monitoring.  No fevers or clinical signs were noted in the exposed horses.  There are no premises under quarantine for neurologic EHV-1 in NJ at this time.

April 21, 2017 Strangles Bay County, FL Confirmed case(s): Quarantine
Source: Florida Department of Agriculture and Consumer Services

On April 20, one premise in Bay County, Florida was placed under quarantine for clinical signs and positive culture for strangles.  The index case became clinical on April 13, about 10 days after arriving from the Bastrop Kill Pen in Louisiana. One of the eight horse on the property is currently displaying clinical symptoms and no horses have left the premises since clinical signs began. This the first case for Bay County and case 17 for Florida in 2017.

April 12, 2017 Strangles Marion County, FL Confirmed case(s): Quarantine

On April 11, one premise in Marion County, Florida was placed under quarantine for clinical signs of strangles.  The index case became clinical on February 25 and the premises was identified though the Florida’s Office of Agricultural Law Enforcement investigation on April 10.  Eleven horses are currently displaying clinical signs. Only three horses have left the premises since clinical signs began and are also quarantined at this time. This the sixth case for Marion County and case 16 for Florida in 2017.