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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.


September 07, 2018
West Nile Virus
Stevens County, WA
Confirmed Case(s): No Quarantine
Source: Washington State Department of Agriculture

The Washington State Department of Agriculture has confirmed a case of equine West Nile virus in a horse in Stevens County that has resided in WA for at least the last three months. A 27-year-old Quarter Horse mare with no vaccination history showed neurologic signs including head tremor and muscle fasciculations. The horse is eating and has a good prognosis

September 07, 2018
West Nile Virus
Middlesex County, ON
Confirmed Case(s): No Quarantine
Source: Ontario Ministry of Agriculture, Food and Rural Affairs

On September 6, the Ontario Ministry of Agriculture Food and Rural Affairs received confirmation of the first case of equine West Nile Virus infection in 2018 in Middlesex County. The five-year-old unvaccinated gelding developed acute and severe neurological signs and was euthanized.

September 07, 2018
Eastern Equine Encephalitis
Municipality of Niagara, Municipality of Hamilton-Wentworth, and Haldimand County, ON
Confirmed Case(s): No Quarantine
Source: Ontario Ministry of Agriculture, Food and Rural Affairs

Between August 14 and September 6, the Ontario Ministry of Agriculture, Food and Rural Affairs received confirmation of six more cases of Eastern Equine Encephalitis in the following areas; 4 in the Regional Municipality of Niagara, 1 in the Regional Municipality of Hamilton-Wentworth and 1 in Haldimand County. The total number of cases for the year is 8 . Affected horses have ranged in age from 1.5 months to 18 years with 6 mares, 1 gelding and 1 male affected. All horses showed onset of severe neurological signs within 24 hours and all were euthanized. All were unvaccinated except one which was incompletely vaccinated.

September 07, 2018
West Nile Virus
Merced County, CA
Confirmed Case(s): No Quarantine
Source: California Department of Food and Agriculture

The California Department of Food and Agriculture confirms the seventh case of equine West Nile Virus in California for 2018. On September 4, 2018, a 16 year old Quarter Horse mare with an unknown vaccination status, in Merced County, displaying neurologic signs was confirmed positive for West Nile Virus. Due to the severity of neurologic signs, the mare was euthanized. For more information on California equine WNV cases for 2018 visit https://www.cdfa.ca.gov/ahfss/Animal_Health/WNV_Info.html

 

September 07, 2018
West Nile Virus
Trumbull, Coshocton and Holmes County, OH
Confirmed Case(s): No Quarantine
Source: Ohio Department of Agriculture

The Ohio Department of Agriculture confirmed the twelfth, thirteenth and fourteenth horses with West Nile Virus (WNV) in 2018. On August 25, 2018 an 8-year-old Standardbred gelding from Trumbull County was noticed to have an unsteady gait. The unvaccinated horse was recumbent and unable to rise on August 26th. Due to the poor prognosis, the owner opted to euthanize the horse on August 26th. This is the first horse to test positive for WNV in Trumbull County. A 21-year-old Hackney pony gelding from Coshocton County had a sudden onset of ataxia. Other signs included facial muscle fasciculations and a fever on August 18th. The horse was not vaccinated against WNC and due to the poor prognosis the owner opted to euthanize the horse on August 23rd. This was the first horse to test positive for WNV in Coshocton in 2018. On August 22nd12-year-old mare Paint mare from Holmes County was ataxic with whole body tremors and appeared neurologic with grinding of the teeth. The horse was treated and appears to be recovering as of September 6th. The horse was not vaccinated against WNV. Serum samples collected from all horses were sent to the National Veterinary Services Laboratory, and reports for all horses had an IgM capture ELISA titer of 1:400 or greater for WNV. For more information go to:  https://www.agri.ohio.gov/wps/portal/gov/oda/divisions/animal-health/home/

 

September 05, 2018
West Nile Virus
Cattaraugus and Genesee Counties, NY
Confirmed Case(s): No Quarantine
Source: New York State Department of Agriculture and Markets

The New York State Department of Agriculture and Markets confirmed two cases of West Nile Virus (WNV). On August 29, 2018 a 10-year old gelding from Randolph, New York in Cattaraugus County had hind end weakness. Over the course of several days, the weakness progressed to the point where the horse could not rise despite medical treatment. The horse had no recent vaccine or travel history and was euthanized on 9/2/2018.  Blood samples confirmed active WNV infection.  The second horse a 12-year old gelding from Piffard, New York in Genesee County had hind end weakness noted by the owner on 9/2/2018. This horse had not been vaccinated in 2 years.  Despite medical treatment, the weakness progressed to the front limbs. The horse was euthanized due to poor prognosis and failure to rise. Blood samples also confirmed active WNV infection.

September 05, 2018
West Nile Virus
Ashtabula, Geauga, and Champaign Counties, OH
Confirmed Case(s): No Quarantine
Source: Ohio Department of Agriculture

The Ohio Department of Agriculture confirmed West Nile Virus (WNV) in a 5-year-old Standardbred mare from Ashtabula County. The horse began showing signs on Friday August 24, 2018. The horse had been weak and recumbent but was able to rise with assistance. A serum sample was collected and submitted to the National Veterinary Services Laboratory (NVSL) on August 25, 2018. On August 26, 2018 the owner opted to euthanize the horse due to the poor prognosis. The horse was not vaccinated against WNV. NVSL reported an IgM capture ELISA titer of 1:400 or greater on August 28th  suggesting recent exposure to WNV. This is the first horse to test positive for West Nile Virus in Ashtabula County, and ninth in Ohio this year. A 2-year-old thoroughbred filly from Geauga County began showing signs facial fasciculation as well as hypersensitivity to touch and sound on August 25th. A serum sample was collected and submitted to National Veterinary Services Laboratory (NVSL) on August 25th. The horse was treated and appears to be recovering as of September 5th. The horse was not vaccinated against WNV. The NVSL reported an IgM capture ELISA titer of 1:400 or greater on August 28th, suggesting recent exposure to WNV. This is the first horse to test positive for WNV in Geauga County. A 5-year-old quarter horse gelding from Champaign County had posterior paresis and overall weakness. Symptoms progressed to a low-grade temperature of 102° and facial fasciculation. The horse was not vaccinated against WNV. A serum sample was sent it to NVSL for testing on August 28th reported a Plaque Reduction Neutralization Test Positive >=1:100 for WNV. The horse was treated and appears to be recovering slowly as of September 5th. This is the first horse to test positive for West Nile Virus in Champaign County. 

September 01, 2018
West Nile Virus
Park and Sheridan Counties, WY
Confirmed Case(s): No Quarantine
Source: Wyoming Livestock Board

The Wyoming Livestock Board has been made aware of four confirmed cases of West Nile Virus in horses. Three of these are in Park County and one in Sheridan County. Equine owners are reminded that vaccines are available to prevent West Nile Virus infections and when administered properly (including initial boosters when indicated) are highly effective. More information on West Nile Virus can be obtained by clicking the “Disease Information” link in the menu bar on the Equine Disease Communication Center website (http://www.equinediseasecc.org )

September 01, 2018
Equine Infectious Anemia
Sweetwater, Lincoln, Teton, Park, and Fremont Counties, WY
Confirmed case(s): Official Quarantine
Source: Wyoming Livestock Board

The Wyoming Livestock Board has quarantined an additional seven premises, totaling nine now, as a result of equine being exposed to a horse originating in Colorado which was found to be positive for Equine Infectious Anemia. Counties include Sweetwater, Lincoln, Teton, Park & Fremont. Forty-one of these equine were exposed at a Sweetwater County premises where the positive horse was sent illegally from Colorado. The remaining horses were exposed to the same horse in Colorado prior to being shipped to Wyoming. All but two of these exposed horses were imported illegally to Wyoming as well. An additional four horses and three premises are still being traced in Natrona and Laramie counties. More information about Equine Infectious Anemia is available at the EDCC website (http://www.equinediseasecc.org ) by clicking on “Disease Information” in the menu bar. The Wyoming Livestock Board would like to remind horse and other livestock owners that the consignor, the consignee, and the shipper of livestock are each individually and equally responsible for making sure that the Wyoming Livestock Board’s import requirements have been met. To find out what health requirements must be met when shipping livestock interstate: ALL state requirements are provided at www.interstatelivestock.comFor brand requirements, the state Brand agency should be contacted directly. In Wyoming brand inspections are required at change of ownership and to move all horses, sheep and cattle from county to county and when leaving the state. More information can be obtained by calling 307-777-7515.

August 31, 2018
West Nile Virus
Holmes County, OH
Confirmed Case(s): No Quarantine
Source: Office of the Ohio State Veterinarian

The Office of the Ohio State Veterinarian has confirmed a case of equine West Nile virus in Homes County. A 16-year-old pony mare began showing signs on August 25th, 2018 including abnormal gait and refusing to bear weight. On Monday August 27th, the emergency equine veterinarian was called out, upon arrival the veterinarian noticed that the pony was laterally recumbent, tachycardic, and had a fever of 105.8°F. Blood was drawn for testing and the owner opted to euthanize the animal. The sample was submitted to the University of Kentucky Veterinary Diagnostic Laboratory on 08/29/2018 and tested positive for West Nile Virus by IgM capture ELISA testing on 08/31/2018. This is the third horse to test positive for West Nile Virus in Holmes County.