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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 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.

October 10, 2017 West Nile Virus Kootenai County, ID Confirmed Case(s): No Quarantine
Source: Idaho Department of Agriculture

The Idaho Department of Agriculture confirmed West Nile Virus in a 1-year old female Quarter Horse with no history of vaccination. Initial signs on 9/16/17 included facial nerve deficit progressing to more severe neurological signs including ataxia in all 4 limbs. The horse's signs have been responsive to treatment. This is the 7th confirmed case of equine WNV in Idaho in 2017.

October 10, 2017 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 has reported a confirmed case of Eastern Equine Encephalitis in Oswego County. The horse was euthanized.

October 10, 2017 West Nile Virus St Lawrence, Cayuga, and Erie 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 has reported four confirmed cases of equine West Nile virus. One horse from St. Lawrence County is still alive but was not vaccinated for the disease. Three more horses from Cayuga County, Erie County, and St Lawrence County were euthanized. Two of the three were not vaccinated; one had been vaccinated but not enough time had elapsed for the vaccination to be protective.

October 09, 2017 Strangles Levy and Lake Counties, FL Confirmed case(s): Quarantine
Source: Florida Department of Agriculture and Consumer Services

On September 25th, 2017, one premise in Lake County, Florida and one premise in Levy County, Florida were placed under quarantine for clinical signs and positive PCR confirmation of Strangles. Each premise had one horse develop clinical signs after riding on a horse trailer together from Louisiana. This is the 4th case for Lake County, the 3rd case for Levy County, and the 28th and 29th cases for the state of Florida.

October 09, 2017 West Nile Virus Collier County, FL Confirmed Case(s): No Quarantine
Source: Florida Department of Agriculture and Consumer Services

On September 30th, 2017, one horse in Collier County, Florida was confirmed positive for West Nile Virus (WNV). The horse was recovered by Collier County Animal Services after Hurricane Irma and became clinical on 9/22/2017. The vaccination history is unknown.

October 09, 2017 Eastern Equine Encephalitis Levy County, FL Confirmed Case(s): No Quarantine
Source: Florida Department of Agriculture and Consumer Services

On September 20th, 2017, one horse in Levy County Florida was confirmed positive for Eastern Equine Encephalitis (EEE). The horse became clinical on 9/19/2017. The vaccination history is unknown.

October 09, 2017 West Nile Virus Garrod County, KY Confirmed Case(s): No Quarantine
Source: The Kentucky Department of Agriculture

The Kentucky Department of Agriculture has reported a confirmed case of equine West Nile virus. An adult Tennessee Walking Horse cross with no WNV vaccination history in Garrod County showed an onset of clinical signs on September 30th. The horse went down with proprioceptive deficits and was euthanized. This is the 14th confirmed case of equine WNV reported in KY in 2017.

October 07, 2017 Equine Infectious Anemia Bedford County, TN Confirmed Case(s): No Quarantine
Source: The Tennessee Department of Agricultures

The Tennessee Department of Agricultures confirmed one horse with Equine Infectious Anemia in Bedford County. 

October 07, 2017 West Nile Virus Davidson, Knox Counties, TN Confirmed Case(s): No Quarantine
Source: Tennessee Department of Agriculture

The Tennessee Department of Agricultures confirmed two cases of West Nile Virus, one in Davidson County and one in Knox County. For more information go to:  https://aaep.org/sites/default/files/Documents/Outside%20Linked%20Documents/DiseaseFactsheet_WNV.pdf