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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.


August 17, 2018
Eastern Equine Encephalitis
Oswego County, 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 the state’s first 2018 EEE case in a horse from West Monroe, NY (Oswego Co). The 2-year old gelding started to show signs on August 8, 2018. The gelding was found down in the woods, was blind with a high fever. The horse died the following day. Brain samples submitted along with concurrent signs of illness confirmed an active EEE infection.

August 16, 2018
Eastern Equine Encephalitis
Regional Municipality of Niagara, ON
Confirmed Case(s): No Quarantine
Source: Ontario Ministry of Agriculture, Food and Rural Affairs

On August 13th  and 14th, the Ontario Ministry of Agriculture, Food and Rural Affairs confirmed two cases of Eastern Equine Encephalitis in the Regional Municipality of Niagara. A mare and her foal were euthanized after developing acute and progressive neurological signs (ataxia leading to recumbency). EEE was confirmed through post mortem testing. The mare had been incompletely vaccinated for EEE. These are the third and fourth cases of EEE in Ontario this year. http://www.omafra.gov.on.ca/english/livestock/horses/facts/nhd_surv2018.htm

August 16, 2018
West Nile Virus
Cache County, UT
Confirmed Case(s): No Quarantine
Source: Utah Department of Agriculture and Food

The Utah Department of Agriculture and Food has confirmed a case of West Nile Virus in Cache County. An unvaccinated, 2-year-old Quarter Horse gelding showed an onset of signs on August 12th, 2018 and was euthanized.

August 15, 2018
West Nile Virus
Fauquier County, VA
Confirmed Case(s): No Quarantine
Source: Virginia Department of Agriculture and Consumer Services

The Virginia Department of Agriculture and Consumer Services (VDACS) today announced the state’s first positive case of West Nile Virus (WNV) in a horse this year. The nine-year-old pony mare from Fauquier County tested positive for WNV at VDACS’ regional animal health laboratory in Warrenton and a USDA lab in Iowa. The horse was not vaccinated for WNV and has recovered. Symptoms included loss of control of bodily movements and partial paralysis in the hind limbs, dazed appearance and lack of ability to stand.

 

August 15, 2018
West Nile Virus
Shasta County, CA
Confirmed Case(s): No Quarantine
Source: California Department of Food and Agriculture

On August 14,2018, the California Department of Food and Agriculture confirmed the first equine West Nile Virus case for 2018. An unvaccinated four year old Quarter Horse mare in Shasta County displaying severe neurologic signs was confirmed positive for West Nile Virus. Due to the severity of clinical signs, the mare was euthanized. For more information visit https://www.cdfa.ca.gov/ahfss/animal_health/WNV_Info.html .

August 15, 2018
West Nile Virus
Mitchell and Mahaska Counties, IA
Confirmed Case(s): No Quarantine
Source: Iowa State Veterinarian

The Iowa State Veterinarian has confirmed West Nile Virus in two horses. On August 1, 2018 an unvaccinated 1-year old Percheron colt in Mitchell County was febrile, recumbent and dog sitting. This horse’s current status is unknown. On August 6, 2018 an unvaccinated 3-year old grade mare in Mahaska County was observed stumbling and became recumbent two days later. This horse’s current status is unknown.

August 14, 2018
Eastern Equine Encephalitis
Haldimand County, ON
Confirmed Case(s): No Quarantine
Source: Ontario Ministry of Agriculture, Food and Rural Affairs

On August 8 and 9th, 2018, the Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) was notified of two confirmed cases of Eastern Equine Encephalitis (EEE) in horses in Haldimand County. Both horses, from separate farms, were unvaccinated for EEE and had no history of travel. They were euthanized following the sudden onset and progression of neurological signs. Laboratory diagnostic testing confirmed infection with EEE virus. Private veterinarians have confirmed that three more horses have demonstrated acute onset of neurological disease within a 5 km radius of these two horses and two have been euthanized.

August 14, 2018
Equine Infectious Anemia
McLennan, Wilson, Ector Counties, TX
Confirmed case(s): Official Quarantine
Source: Texas Animal Health Commission

On July 13, 2018, Texas Animal Health Commission (TAHC) officials reported Equine Infectious Anemia (EIA) in one McLennan County Quarter Horse. Since that time, two additional horses from the quarantined premises have been confirmed positive for EIA. On June 13, 2018, TAHC reported EIA in two Wilson County Quarter horses on one premises. Since that time, one additional horse from the quarantined premises has been confirmed positive for EIA. The positive horses have been euthanized. Lastly, TAHC officials confirmed EIA in one Ector County Quarter Horse. The premises in McLennan, Wilson, and Ector counties will remain under quarantine until requirements for release have been met. TAHC staff is working closely with owners and veterinarians to monitor potentially exposed horses and implement biosecurity measures.

August 14, 2018
West Nile Virus
Orkney, SK
Confirmed Case(s): No Quarantine
Source: Canadian Animal Health Surveillance System

The Canadian Animal Health Surveillance System has confirmed a case of West Nile Virus in a four and a half-year-old Quarter Horse Mare in Orkney, Saskatchewan. The mare survived. For more information go to https://www.cahss.ca/groups/equine-national-health-surveilla/

August 13, 2018
West Nile Virus
Grant County, WA
Confirmed Case(s): No Quarantine
Source: Washington State Department of Agriculture

The Washington State Department of Agriculture confirmed its first case of West Nile virus in a 5 year old Quarter Horse gelding in Grant County. Washington. The horse may have had one vaccination and has a neurological deficit in the right rear. The prognosis at this time appears to be favorable and the horse is receiving supportive care.