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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
December 12, 2017 Strangles Sonoma County, CA Confirmed case(s): Quarantine
Source: Attending Veterinarian

An attending veterinarian has reported a quarantine for Strangles was established at a private facility in Sonoma County, California on November 26th, 2017. An 11-year-old warmblood gelding presented with purulent nasal discharge, cough, and a fever and subsequent testing confirmed the horse was positive for Strangles. The horse is receiving treatment and is in isolation. The facility is on voluntary restriction of horse movement into or out of the barn until December 14th, 2017.

December 12, 2017 West Nile Virus Glenn County, CA Confirmed Case(s): No Quarantine
Source: California Department of Food and Agriculture

The California Department of Food and Agriculture confirmed the 21st case of Equine West Nile Virus in California for 2017. The two year old Quarter Horse gelding displaying ataxia in Glenn County, California is recovering. The vaccination status for this horse is unknown. For more information visit: https://www.cdfa.ca.gov/ahfss/Animal_Health/WNV_Info.html

December 11, 2017 Equine Herpes Viruses Bethany, CT Confirmed case(s): Quarantine
Source: Attending Veterinarian

An outbreak of Equine Herpesvirus Myeloencephalopathy was confirmed in Bethany, Connecticut. Clinical signs were seen on 12/5/2017 in a private facility. One horse was confirmed positive a Cornell University on 12/10/17. Currently a 4-year old Quarter Horse mare was confirmed positive and tests on a 20-year old, a 14-year old and a 26- year old Quarter Horse geldings are pending. Signs include 102-104 F fevers, mild in appetence and hindlimb ataxia with dribbling urine. All horses, which were vaccinated are alive and receiving treatment. Potentially 30-35 horses have been exposed and currently 20 horses are in quarantine established by the Connecticut Department of Agriculture. 

December 11, 2017 Equine Herpes Viruses Champaign County, IL Confirmed case(s): Quarantine
Source: University of Illinois Veterinary Diagnostic Laboratory

The University of Illinois Veterinary Diagnostic Laboratory confirmed two positive cases of equine herpesvirus myeloencephalopathy at a private facility in Champaign County. Out of 24 horses on the facility 5 presented with fever greater than 102 degrees and hind limb swelling. Two of those horses were confirmed positive for EHV-1. The index case, a 28-year-old Quarter Horse mare, became recumbent and was euthanized. One other horse was also euthanized for unrelated complications. The facility is currently under quarantine and checking temperatures twice daily.

December 08, 2017 Strangles Indian River County, FL Confirmed case(s): Quarantine
Source: Florida Department of Agriculture and Consumer Services

On December 6th, 2017 the Florida Department of Agriculture and Consumer Services confirmed one premise in Indian River County was placed under quarantine for clinical signs and positive PCR confirmation of Strangles. The index case became clinical on November 20th after residing at a training facility in Lee County. All other horses at both locations are free of clinical signs. This is the first case of reported Strangles in Indian River County and the 40th for the state of Florida.

December 08, 2017 Strangles Volusia County, FL Confirmed case(s): Quarantine
Source: Florida Department of Agriculture and Consumer Services

On December 5th, 2017 the Florida Department of Agriculture and Consumer Services confirmed one premise in Volusia County, Florida was placed under quarantine for clinical signs and positive PCR confirmation of Strangles. The index case became clinical on December 2nd. All other horses on the premise are free of clinical signs at this time. This is the first case of reported Strangles in Volusia County and the 39th for the state of Florida.

December 08, 2017 Strangles Manatee County, FL Confirmed case(s): Quarantine
Source: Florida Department of Agriculture and Consumer Services

On December 4th, 2017 the Florida Department of Agriculture and Consumer Services confirmed three premises in Manatee County, Florida were placed under quarantine for clinical signs of Strangles. All four horses began showing clinical signs after a trail ride event on November 18th in Citrus County. These are the first 3 cases of Strangles in Manatee County and the 36-38th cases for the state of Florida.

December 06, 2017 Strangles Palm Beach, Gulf, Marion, and Pasco County, FL Information Only
Source: Florida Department of Agriculture and Consumer Services

The Florida Department of Agriculture and Consumer Affairs has reported six outbreaks of Strangles that were confirmed in October and November. On October 12th 2017, one premise in Palm Beach County, Florida was placed under quarantine for clinical signs and positive PCR confirmation of Strangles. The index case became clinical on October 9th. One of the ten horses on the property was clinical at the time of quarantine. On October 23rd 2017, one premise in Palm Beach County, Florida was placed under quarantine for clinical signs and positive PCR confirmation of Strangles. The index case became clinical around October 2nd. One of the three horses on the property was clinical at the time of quarantine. On November 1st 2017, one premise in Gulf County, Florida was placed under quarantine for clinical signs and known exposure to Strangles. The index case became clinical on October 28th after residing at an Oklahoma sale barn. Two of the twelve horses on the property were clinical at the time of quarantine. On November 3rd 2017, one premise in Marion County, Florida was placed under quarantine for clinical signs and positive PCR confirmation of Strangles. The index case became clinical on October 31st. One of the five horses on the property was clinical at the time of quarantine. On November 3rd, 2017, a second premise in Marion County, Florida was placed under quarantine for clinical signs of Strangles. The index case became clinical on October 30th. One of the fourteen horses on the property was clinical at the time of quarantine. On November 10th 2017, one premise in Pasco County, Florida was placed under quarantine for clinical signs and positive PCR and culture confirmation of Strangles. The index case became clinical on November 3rd. One of the three horses on the property was clinical at the time of quarantine. This brings the count of Strangles quarantines to 35 in 2017.  

December 06, 2017 West Nile Virus Palm Beach County, FL Confirmed Case(s): No Quarantine
Source: Florida Department of Agriculture and Consumer Affairs

The Florida Department of Agriculture and Consumer Affairs has reported a case of Equine West Nile Virus which was confirmed in October. On October 25, 2017 a horse in Palm Beach County was confirmed positive for West Nile Virus. The unvaccinated 2 year old stallion became neurologic on October 25th. The horse responded favorably to treatment. This is the 1st WNV case for Palm Beach County and the 4th for the state of Florida in 2017.

December 03, 2017 Equine Influenza Fort Valley, GA Confirmed Case(s): No Quarantine
Source: Attending veterinarian

On November 20, 2017 an arabian gelding in Fort Valley, Georgia had serous nasal discharge and a 105.2 fever and was confirmed to have equine influenza. Twenty two horse were exposed and no horses were isolated. The affected horse had a good vaccination history and is alive.