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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 16, 2017 Eastern Equine Encephalitis Bruce County, ON Confirmed Case(s): No Quarantine
Source: Ontario Ministry of Agriculture, Food and Rural Affairs

On October 12, 2017, the Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) was notified of a confirmed case of Eastern Equine Encephalitis (EEE) in a horse in Bruce County. The 12-year old unvaccinated mare with no travel history was euthanized following the sudden onset and progression of neurological signs. The horse was found down in the field, became unresponsive and was euthanized. A post-mortem examination was performed at the Animal Health Laboratory in Guelph, Ontario and EEE was confirmed by testing of brain tissue.

October 13, 2017 Eastern Equine Encephalitis Marathon 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 confirmed Eastern Equine Encephalitis in an unvaccinated 10-year-old Appaloosa gelding from Marathon County.  The horse began showing clinical signs (fever, recumbency, paddling) on 10/2/17 and was sampled and euthanized that day. This is the 23rd case of EEE in Wisconsin during 2017.

October 13, 2017 Eastern Equine Encephalitis Price 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 has confirmed Case #22 off EEE in an equine for 2017.  Confirmatory testing was done at NVSL in Ames, IA.  The horse, located in Price County, was a yearling Friesian stallion of unknown vaccination history purchased this spring.  He began showing clinical signs (fever, ataxia, head tilt, head pressing, and disorientation) on 9/20/17 and a veterinarian was called to the farm that day.  The horse was euthanized

October 13, 2017 West Nile Virus Columbiana County, OH Confirmed Case(s): No Quarantine
Source: Ohio Department of Agriculture Animal Disease Diagnostic Laboratory

The Ohio Department of Agriculture Animal Disease Diagnostic Laboratory has reported a confirmed case of equine West Nile virus in Columbiana County. The 18 year-old thoroughbred mare with unknown vaccination status showed acute onset of clinical signs on 9/4/17 including neurologic signs, weakness in the hind limbs, muscle fasciculations, heart rate >100 bpm, and a temperature of 103 F. The mare was euthanized later that day. This is the 11th case of equine West Nile virus in Ohio for 2017.

October 12, 2017 West Nile Virus Tooele, Sevier, Duchesne, Cache, UT Confirmed Case(s): No Quarantine
Source: The Utah Department of Agriculture and Food

The Utah Department of Agriculture and Food confirmed 5 horses located in Duchesne, Tooele, Cache, and Sevier counties have tested positive for equine West Nile virus. Three of the horses were treated and are recovering. There have been a total of 39 confirmed cases of WNV in Utah for 2017. For more information go to ag.utah.gov/animal

October 12, 2017 Eastern Equine Encephalitis Cumberland County, NJ Confirmed Case(s): No Quarantine
Source: New Jersey Department of Agriculture

The New Jersey Department of Agriculture confirmed Eastern Equine Encephalitis in an unvaccinated 15-year-old Cumberland County mare. The onset of the illnesses was 9/30/17, and the mare was euthanized.  This is the third reported case in 2017 of EEE in New Jersey.   

October 12, 2017 West Nile Virus Gloucester and Salem Counties, NJ Confirmed Case(s): No Quarantine
Source: New Jersey Department of Agriculture

The New Jersey Department of Agriculture confirmed the first case of West Nile Virus in 2017 in a 1-year-old colt in Gloucester County in late September. The colt was given an initial vaccination but did not receive a booster shot. The colt is being treated. The onset of illness was unknown.  A second case of WNV in 2017 was a 10-year-old Salem County stallion. The stallion was unvaccinated and is being treated for its illness. The onset of illness was 9-29-17.

October 12, 2017 West Nile Virus Bruce County, Simcoe County, Durham County, Grey County, Sudbury District and the Regional Municipality of Niagara, ON Confirmed Case(s): No Quarantine
Source: Ontario Ministry of Agriculture, Food and Rural Affairs

Since September 20th,   6 cases of West Nile Virus in Bruce County, Simcoe County, Durham County, Grey County, Sudbury District and the Regional Municipality of Niagara were reported to the Ontario Ministry of Agriculture, Food and Rural Affairs. The horses included 4 geldings and 2 mares with ages ranging from 2 to 15 years. Clinical signs ranged from hind end weakness and lethargy to recumbency, facial paralysis and severe hyperesthesia. Three of the horses were euthanized and three are recovering under veterinary supervision. Five horses were unvaccinated and one had an unknown vaccination history. The total number of cases reported in Ontario this year is 18.

http://www.omafra.gov.on.ca/english/livestock/horses/facts/nhd_surv2017.htm

http://www.omafra.gov.on.ca/french/livestock/horses/facts/nhd_surv2017.htm

October 11, 2017 West Nile Virus Kay County, OK Confirmed Case(s): No Quarantine
Source: Oklahoma Department of Agriculture, Food and Forestry

The Oklahoma Department of Agriculture, Food and Forestry reported the third West Nile Virus positive horse for Oklahoma in 2017. The adult Quarter Horse mare located in Kay County was showing moderate neurologic signs.  Vaccination history is unknown.  A quarantine was not issued.  For more information visit: http://www.ag.ok.gov

October 11, 2017 Eastern Equine Encephalitis Marquette County, MI Confirmed Case(s): No Quarantine
Source: Michigan Department of Agriculture and Rural Development

The Michigan Department of Agriculture and Rural Development has received confirmation of two additional cases of Eastern Equine Encephalitis (EEE). Both of the horses were from Marquette County and were unvaccinated. The cases are as follows: a 25-year-old Quarter Horse gelding that developed a sudden onset of drooling, stumbling, blindness and seizures; and an 11-year-old Quarter Horse gelding from a different farm in Marquette County that was circling and stumbling. Both horses were euthanized. No quarantines were placed. These horses bring the total number of reported cases of EEE in Michigan for 2017 to six: two from Marquette County, two from Clare County, one from Roscommon County, and one from Wexford County.