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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
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.

April 06, 2017 Strangles Marion County, FL Confirmed case(s): Quarantine
On April 5, one premise in Marion County, Florida was placed under quarantine for strangles due to clinical signs and positive test confirmation. The index case became clinical on March 23 and samples were taken March 30. The index is the only horse on the premises currently displaying clinical signs. An epidemiological investigation is currently in progress. This the fifth case for Marion County and case 15 for Florida in 2017.
April 05, 2017 Equine Herpes Viruses Anne Arundel County, MD Outbreak Update
Source: Virginia Department of Agriculture

On April 2, a horse exhibiting neurologic signs was transported to the isolation facility at Marion duPont Scott Equine Medical Center in Leesburg, Virginia from Anne Arundel County, Maryland. The horse was euthanized shortly after arrival. On April 4, the Virginia Department of Agriculture and Consumer Services’ (VDACS) Animal Health Lab in Warrenton, Virginia confirmed a diagnosis of Equine Herpesvirus-1 (EHV-1). The Marion duPont Scott Equine Medical Center employed strict biosecurity measures and disinfection upon arrival and during the horse’s hospitalization. As a result, no horses in Virginia were exposed. The Equine Medical Center is operating normally. For more information go to: http://www.vdacs.virginia.gov/animals-equine-herpes-virus.shtml or contact VDACS’ Office of Veterinary Services at 804.786.2483.

April 05, 2017 Strangles Sanpete County, UT Confirmed case(s): Quarantine
Source: The Bureau of Land Management

The Bureau of Land Management (BLM) and the Axtell Contract Off-Range Corrals have issued a voluntary quarantine of wild horses at the facility due to an outbreak of upper respiratory tract infection. Individual infected animals are being tested for the exact cause, but early diagnosis indicates “strangles”. BLM officials have notified the Utah State Veterinarian of the outbreak, who visited the facility. Coordination is also occurring with Utah Veterinary Diagnostic Laboratory for testing of the infected horses. The Axtell facility staff began seeing signs of strangles on March 27. No mortality of horses has occurred from the localized outbreak, only clinical signs are being observed at this time. For more information go to https://www.blm.gov/press-release/horses-axtell-wild-horse-corrals-quarantined-until-further-notice

April 05, 2017 Equine Herpes Viruses Hunterdon and Somerset Counties, NJ Confirmed case(s): Quarantine
Source: The New Jersey Department of Agriculture

The New Jersey Department of Agriculture has quarantined properties in Hunterdon and Somerset counties after a horse developed highly infectious equine herpes myeloencephalopathy (EHM). No recent movement had occurred at the farm where the virus was reported prior to this case. The horse was moved into the isolation barn at a local animal hospital the evening EHM was confirmed. Both the horses at the original farm and the hospital are under quarantine. Nine horses were being treated at the hospital at the time of the incident; several horses were exposed to the ill horse. Seven of these horses will be moved to a remote facility, which also will be placed under quarantine so the hospital can be cleaned and disinfected in order to reopen. Other than the initial case, none of the quarantined horses at either location are showing clinical signs at this time. Both locations are taking the necessary biosecurity precautions to limit the spread of the virus. Temperatures also are being taken twice daily on all quarantined horses. For more information go to http://nj.gov/agriculture/news/press/2017/approved/press170404.html

April 04, 2017 Strangles Washington County, RI Confirmed case(s): Quarantine

Strangles has been diagnosed by an attending veterinarian of a boarding and training facility in Washington County, Rhode Island. The horses affected vary in age and gender and have displayed clinical signs including fever, cough, nasal discharge, and enlarged lymph nodes. Culture of a lymph node aspirate confirmed infection with Strep equi. The RI State Veterinarian issued an order of quarantine on April 4th for all equines housed at the facility. This facility houses horses owned by multiple owners and are cared for by multiple veterinarians. All attending veterinarians have been notified. At this point fewer than 10% of the horses have shown clinical signs.

April 04, 2017 Equine Herpes Viruses Anne Arundel County, MD Investigation Initiated

A horse stabled in Anne Arundel County in Maryland was transported to Marion duPont Scott Equine Medical Center in Leesburg, Virginia on the evening of April 2, where it exhibited severe neurological signs, was placed in isolation, and was euthanized shortly after arrival. A diagnosis of Equine Herpesvirus Myeloencephalopathy cause by the non-neuropathic strain of EHV-1 was confirmed on April 4 by the Virginia Department of Agriculture and Consumer Services’ Animal Health Lab in Warrenton, Virginia. The farm is presently under a 21-day investigational hold and strict biosecurity measures are in place while Maryland Department of Agriculture inspectors perform additional epidemiological and infectious disease testing. The stable owner is contacting boarders and students. Potential epidemiologic links to the sick horse are being notified of the situation and owners are cautioned to carefully monitor horses at their premises. For more information go to: http://news.maryland.gov/mda/category/mda-newsroom/. Additional information on Equine Herpesvirus Myeloencephalopathy go to: https://aaep.org/sites/default/files/Documents/DiseaseFactsheetEHM.pdf