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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
October 03, 2017 West Nile Virus Kent County, DE Confirmed Case(s): No Quarantine
Source: Delaware Department of Agriculture

The Delaware Department of Agriculture has confirmed a case of West Nile virus in Kent County. The 4 year-old Standardbred mare showed an onset of clinical signs on September 23rd and went down in the pasture with a fever on the 24th. The horse was still alive when the case was reported.

October 02, 2017 Eastern Equine Encephalitis Monroe and Juneau Counties, WI Confirmed Case(s): No Quarantine
Source: Wisconsin Department of Agriculture, Trade and Consumer Protection

The Wisconsin Department of Agriculture, Trade and Consumer Protection confirmed Eastern Equine Encephalitis in a A 15-year old Arabian cross mare from Monroe County with an unknow vaccination status. The mare began showing neurologic ataxia and paresis on 9/11/17.  Despite treatment, the mare went down and later died on 9/23/17.  Testing of brain (PCR) was performed at WVDL. The second case was an an unvaccinated 12-year-old Quarter Horse gelding from Juneau County began staggering and went down on 9/23/17.  The attending veterinarian sampled and treated the horse that day; he reported the horse was febrile and more or less comatose when he saw him.   The owner called back to report the horse had not improved and the veterinarian recommended euthanasia.  It is not know if the horse was euthanized.  Testing (IgM capture ELISA) was performed at NVSL. These are cases 18 and 19 for 2017.

October 02, 2017 West Nile Virus Adair County, KY Confirmed Case(s): No Quarantine
Source: Kentucky Department of Agriculture

The Kentucky Department of Agriculture confirmed West Nile Virus on September 29, 2017 in ADAIR County. On 9/19/17 a 1.5- year old male  Tennesee Walking Horse cross, which has no WNV vaccination history was initially down with proprioceptive deficits, responded to treatment and currently is asymptomatic. This is the 13th Equine West Nile case diagnosed in KY during 2017. 

October 02, 2017 West Nile Virus Clinton, Erie, Genesee, Montgomery and Niagara Counties, NY Confirmed Case(s): No Quarantine
Source: New York Department of Agriculture & Markets

The New York Deparment of Agriculture and Markets confirmed 6 horses with West Nile Virus. Ages ranged from 1 to 30-years old and were found in the following locations: Cadyville (Clinton County); Grand Island and Lawtons (Erie County); Batavia (Genesee County) Amsterdam (Montgomery County) and Sanborn (Niagara County). None of the horses were vaccinated. There are alive and 3 were euthanized. 

October 02, 2017 West Nile Virus Garvin County, OK Confirmed Case(s): No Quarantine
Source: Oklahoma Department of Agriculture, Food and Forestry

The Oklahoma Department of Agriculture, Food and Foresty confirmed the second West Nile Virus positive horse for 2017 in Oklahoma. The 2-year old Quarter Horse gelding located in Garvin County was showing moderate neurologic signs.  Vaccination history is unknown.  A quarantine was not issued.  For more information visit: http://www.ag.ok.gov

September 29, 2017 West Nile Virus Pulaski County, KY Confirmed Case(s): No Quarantine
Source: Kentucky Department of Agriculture

The Kentucky Department of Agriculture confirmed West Nile Virus in a 2-year old male Tennessee Walking Horse presenting with ataxia and muscle fasiculations on 9-16-17. The horse which has no WNV vaccination history is responding to treatment with near full recovery. This is the 12th case of WNV in Kentucky in 2017.

September 28, 2017 Eastern Equine Encephalitis Taylor, Clark and Chippewa Counties, WI Confirmed Case(s): No Quarantine
Source: Wisconsin Department of Agriculture, Trade and Consumer Protection

The Wisconsin Department of Agriculture, Trade and Consumer Protection confirmed 3 cases of Eastern Equine Encephalitis. Horses included an unvaccinated Standardbred mare (age, clinical signs, and outcome unknown at this time) from Taylor County; a 3-year-old unvaccinated Quarter Horse stallion from Clark County found unable to rise and died shortly after he was sampled on 9/14/17; and a 5-year-old  Quarter Horse mare from Chippewa County found  lethargic in the morning of 9/17.  When examined by a veterinarian in the evening mare was  lethargic, reluctant to move, and ataxic.  The mare became recumbent during the night and was sampled and euthanized the next morning.  According to the attending veterinarian, this horse was vaccinated last year, but not this year. These are #15, 16, and 17 equine EEE cases in WI this year.

September 28, 2017 West Nile Virus Weber, Cache, Uintah, Beaver Counties, UT Confirmed Case(s): No Quarantine
Source: http://ag.utah.gov/animal/animal-health.html

The Utah Department of Agriculture and Food confirmed West Nile Virus in 4 horses between 9/21/17 to 9/25/17 in Weber, Cache and Uintah.  Horses included a 3-year old Quarter Horse gelding, a 6-year Quarter Horse mare, a Quarter Horse gelding and a 6-year old mare. Two horses were treated and are recovering and two horses were euthanized. A fifth horse presenting with  neurologic signs suggestive of WNV did not  have samples submitted and was euthanized due to the severity of clinical signs.

September 28, 2017 West Nile Virus Logan County, OK Confirmed Case(s): No Quarantine
Source: Oklahoma Department of Agriculture, Food and Foresty

The Oklahoma Department of Agriculture, Food and Foresty confirmed the first case of West Nile Virus for 2017 in a 12 year old Quarter Horse gelding in Logan County. The horse was showing severe neurologic signs and was euthanized. 

September 28, 2017 West Nile Virus Hillsdale County, MI Confirmed Case(s): No Quarantine
Source: Michigan Department of Agriculture and Rural Development

The Michigan Department of Agriculture and Rural Development received confirmation of an unvaccinated, one-year-old Standardbred filly from Hillsdale County that tested positive for West Nile virus (WNV). The horse developed acute neurologic disease and was euthanized.  No quarantines were issued. This case brings the total number of reported cases of WNV in Michigan in 2017 to 14, one case from each of the following counties: Clinton, Hillsdale, Jackson, Livingston, Mecosta, Midland, Missaukee, Montcalm, Osceola, Ottawa, Roscommon, and St Joseph Counties and two cases from Wexford County.