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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.


November 14, 2017
Equine Herpes Viruses
Warren County, NJ
Outbreak Update
Source: New Jersey Department of Agriculture

On November 8, 2017, the New Jersey Department of Agriculture confirmed Equine Herpes Myeloencephalopathy (EHM) in a 25-year-old Quarter Horse mare in Warren County, NJ.  The mare was euthanized on November 2, 2017.  All horses at the premises are quarantined.  Biosecurity measures were implemented, and horses are being monitored.  No other horses have shown signs of EHM.  Exposed horses that attended shows are in good health.  Organizers of the events attended by these horses have been contacted directly, and attendees have been notified about the possible exposure.  Concerned owners should contact their veterinarians.

November 13, 2017
West Nile Virus
Graves County, KY
Confirmed Case(s): No Quarantine
Source: Kentucky Department of Agriculture

On November 9, 2017, the Kentucky Department of Agriculture confirmed West Nile Virus in a female Quarter Horse cross in Graves County.  The mare had facial and shoulder twitching and had not vaccination history.  This is the 16th case of WNV in Kentucky in 2017.

November 13, 2017
Potomac Horse Fever
Lewis, WA
Confirmed Case(s): No Quarantine
Source: Attending Veterinarian

An attending veterinarian has confirmed two cases of Potomac Horse Fever in horses located in Lewis, Washington. Clinical signs appeared on 10/18/2017. Two horses were affected, one was euthanized, the other is receiving treatment.

November 13, 2017
West Nile Virus
Muskogee County, OK
Confirmed Case(s): No Quarantine
Source: Oklahoma Department of Agriculture, Food and Forestry

The Oklahoma Department of Agriculture, Food and Forestry confirmed the 6th reported WNV positive horse for 2017 in Oklahoma. The 5 year old Tennessee Walker gelding located in Muskogee County was showing severe neurologic signs and was euthanized.  The horse was not vaccinated.  A quarantine was not issued.  For more information visit: http://www.ag.ok.gov

November 10, 2017
Equine Herpes Viruses
Coos Bay, OR
Confirmed case(s): Official Quarantine
Source: College of Veterinary Medicine atOregon State University

The veterinary college at Oregon State University confirmed Equine Herpesvirus Myeloencephalopathy in a 12-year old mare from Coos Bay Oregon. The mare is currently stable and in isolation in the large animal clinic at Oregon State University. 

 

November 09, 2017
Equine Herpes Viruses
Warren County, NJ
Confirmed case(s): Official Quarantine
Source: New Jersey Department of Agriculture

The New Jersey Department of Agriculture confirmed Equine Herpesvirus Myeloencephalitis (EHM) in Warren County, New Jersey. The 25-year old Quarter Horse was euthanized on November 2, 2017. There are other horses on the premises that were exposed to the affected horse as well as other horses at a New Jersey horse show were potentially exposed. Immediate biosecurity measures are in effect at the home premises and will be in place for the duration of the 21-day quarantine.  Additionally, all the horses on the quarantined premises will be temperature checked twice daily in order to confirm the virus is not spreading.  Currently, one of the exposed horses at the home premises has demonstrated an increase in temperature.  Trace backs are currently being performed for all potentially exposed horses.  For more information go to: https://aaep.org/sites/default/files/Documents/DiseaseFactsheetEHM.pdf

November 09, 2017
West Nile Virus
Moravia (Cayuga County), Avon (Livingston County), Altmar (Oswego County), Rensselaer Falls (St. Lawrence County) and Macedon (Wayne County, NY
Confirmed Case(s): No Quarantine
Source: New York State Department of Agriculture

The New York State Department of Agriculture confirmed 5 cases of West Nile Virus. The horses ranged from 2 to 22-years old, and none were recently vaccinated. The horses were located in Moravia (Cayuga County), Avon (Livingston County), Altmar (Oswego County), Rensselaer Falls (St. Lawrence County) and Macedon (Wayne County). Three horses are alive and 2 were euthanized.

November 06, 2017
West Nile Virus
Calumet County, WI
Confirmed Case(s): No Quarantine
Source: Wisconsin Department of Agriculture, Trade, and Consumer Protection

The Wisconsin Department of Agriculture, Trade, and Consumer Protection have reported a case of equine West Nile Virus. A 19-year-old Paint gelding from Calumet County showed swollen limbs and decreased anal tone on 10/24/17.  He initially tested positive for Anaplasmosis and was treated at the veterinary clinic and later went home.  He then became more neurologic and returned to the clinic on 10/30/17.  That’s when they tested him for WNV and he was positive via IgM Capture ELISA.  The horse was vaccinated in 3/17 and has been vaccinated every year for many years, according to the clinic.  He has gone home again and is recovering. This case is confirmed equine WNV case #23 in WI for 2017.

November 03, 2017
West Nile Virus
Dorchester, Spartanburg Counties, SC
Confirmed Case(s): No Quarantine
Source: South Carolina State Veterinarians Office

The South Carolina State Veterinarian’s office confirmed 2 West Nile Virus in two horses one in Dorchester and Spartanburg Counties. the 11-year old miniature horse in Dorchester County had an unknown vaccination status an died. In Spartanburg County, an unvaccinated 26-year old Tennessee Walking Horse was euthanized.

November 03, 2017
Eastern Equine Encephalitis
Horry County, SC
Confirmed Case(s): No Quarantine
Source: South Carolina State Veterinarian's Office

The South Carolina State Veterinarian’s office confirmed EEE in a horse in Horry County (Myrtle Beach area). This 7-year old Quarter Horse with unknown vaccination status was euthanized.