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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
November 22, 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 West Nile Virus in a 2-year old Thoroughbred filly located in Muskogee County. The horse was showing mild neurologic signs and was not vaccinated.  For more information visit: http://www.ag.ok.gov.

November 17, 2017 West Nile Virus Greenwood County, SC Confirmed Case(s): No Quarantine
Source: South Carolina State Veterinarian

The South Carolina State Veterinarian’s office has received NVSL confirmation for the first West Nile Virus (WNV) case in Greenwood County. The case was a 14 year old gelding with unknown vaccination status and was euthanized.

November 16, 2017 Equine Herpes Viruses Coos Bay, OR Outbreak Update
Source: College of Veterinary Medicine at Oregon State University

The horse affected with Equine Herpesvirus Myeloencephalitis at Oregon State University had a negative nasal swab on November 13, 2017Because this affected horse is stable and not shedding the virus, it will be released to the owner's private barn this week. There has been no confirmed transmission to any other horses in the veterinary hospital and they will remain in quarantine until November 27, 2017.

November 15, 2017 Pigeon Fever King County, WA Confirmed case(s): Quarantine
Source: Washington State department of Agriculture

The Washington State Department of Agriculture has 3 positive horses confirmed for Pigeon Fever near the towns of Duvall and Carnation in King County. The 3 horses are a 15 year old Paint gelding, a 14 year old Halflinger cross gelding and a 25 year old Tennessee walker mare.  The horses are under the direct supervision of a veterinarian where biosecurity and treatment measures are being managed at this time.  The horses are under a voluntary hold order.

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): 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): 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