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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.


February 26, 2018
Equine Herpes Viruses
Maricopa County, AZ
Confirmed case(s): Official Quarantine
Source: Arizona Department of Agriculture

The Arizona Department of Agriculture has confirmed a case of equine herpesvirus myeloencephalopathy in a Quarter Horse in Maricopa County. Clinical signs included fever, ataxia, and  neurological symptoms. The affected horse was confirmed positive for EHV-1.  The premise is under quarantine and strict biosecurity is being followed. The epidemiological investigation is ongoing.

February 26, 2018
Equine Herpes Viruses
Gooding and Jerome Counties, ID
Quarantine Released
Source: Idaho State Department of Agriculture

The Idaho State Department of Agriculture has released the quarantine of premises in both Jerome & Gooding counties due to EHM. Three other premises in Gem, Bannock and Cassia county remain under quarantine due to EHV-1.

February 26, 2018
Strangles
Escambia and Alachua Counties, FL
Confirmed case(s): Official Quarantine
Source: Florida Department of Agriculture and Consumer Affairs

On February 6th, 2018, one premise in Escambia County, Florida was placed under quarantine for clinical signs of Strangles. One of the six equines on the premise are showing clinical signs at this time. This is the first cases of Strangles reported in Escambia County in 2018. On February 20th, 2018, one premise in Alachua County, Florida was placed under quarantine for clinical signs of Strangles. Seven of the eight horses on the premise are showing clinical signs at this time. On February 26th, 2018, one premise in Alachua County, Florida was placed under quarantine for clinical signs of Strangles. The horse became clinical after returning home from training. There are no sick horses at the training facility at this time. These are the first and second cases of Strangles reported in Alachua County in 2018 and these three cases bring the number of Strangles cases reported in Florida to seven overall in 2018.

February 26, 2018
Eastern Equine Encephalitis
Nassau County, FL
Confirmed Case(s): No Quarantine
Source: Florida Department of Agriculture and Consumer Affairs

On February 12th, 2018, one horse in Nassau County Florida was confirmed positive for Eastern Equine Encephalitis (EEE). The 7 year old Quarter Horse mare became clinical on January 31st and was euthanized due to a poor prognosis. The vaccination history is unknown.

February 26, 2018
Equine Herpes Viruses
The Meadows Racetrack, PA
Outbreak Update
Source: Pennsylvania Department of Agriculture

The Pennsylvania Department of Agriculture has reported that three barns at The Meadows Racetrack remain under quarantine for having or previously having EHM horses. A total of 4 EHM horses have been identified with an additional 8 horses that have tested positive for EHV-1 without neurologic signs in this incident. The last EHM case was identified on February 23, 2018.  A daily monitoring period for clinical signs in the remaining exposed, asymptomatic horses is ongoing in the quarantined barns. Updates will be posted as they become available.

February 22, 2018
Equine Herpes Viruses
Los Alamitos Race Course, CA
Outbreak Update
Source: California Department of Food and Agriculture

 The California Department of Food and Agriculture and California Horse Racing Board (CHRB) staff onsite  at the Los Alamitos Race Course continue to monitor the quarantine. Only one barn of eleven exposed horses is currently under quarantine. Enhanced biosecurity measures have been implemented with twice daily temperature monitoring of exposed horses. The temperatures of the eleven exposed horses remain normal. No additional cases have been identified.

February 22, 2018
Equine Herpes Viruses
King County, WA
Quarantine Released
Source: Washington State Department of Agriculture

The Washington Department of Agriculture has released the quarantine for the King County horse which tested positive for non-neurotropic EHV 1. The affected horse has never shown any outward clinical signs for EHV 1 and the recovery seems uneventful. The quarantine was originally issued on February 5, 2018.      

February 21, 2018
Equine Herpes Viruses
Los Alamitos Race Course, CA
Confirmed case(s): Official Quarantine
Source: California Department of Food and Agriculture

California Department of Food and Agriculture (CDFA) confirmed Equine Herpesvirus Myeloencephalopathy (wild-type strain) in a 10 year old horse ( lead pony) displaying neurologic signs at Los Alamitos Race Course. The horse was euthanized. A quarantine has been issued for exposed horses. All exposed horses will be monitored for clinical signs and temperatures will be taken twice daily. CDFA and California Horse Racing Board staff are onsite ensuring biosecurity measures are implemented and will continue to monitor the situation.

February 18, 2018
Equine Herpes Viruses
The Thoroughbred Center, Lexington, KY
Outbreak Update
Source: Kentucky Department of Agriculture

On Friday, February 16, 2018 the Kentucky Department of Agriculture quarantined Barn 30 (in addition to Barn 3 that was quarantined earlier this week, and Barn 7 that is being used to house positive horses) at the Thoroughbred Center in Lexington following a horse in that barn being confirmed positive for EHV-1 ‘wild type’.  The 3-year old Thoroughbred filly tested PCR positive on both nasal swab and blood. The patient, after presenting with a fever, was moved from the barn into isolation and precautionary measures implemented on Thursday evening.  With the confirmation of EHV1 on Friday Barn 30 was quarantined, perimeter fencing to control movement in and around the barn area erected, guarded security placed on the barn and biosecurity procedures implemented at ALERT status. 

February 18, 2018
Equine Herpes Viruses
Belmont Park, Elmont, NY
Confirmed case(s): Official Quarantine
Source: New York State Department of Agriculture and Markets

The New York State Department of Agriculture  and Markets confirmed the 4 yr old TB filly displaying neurologic signs on February 15, 2018 tested positive for EHV-1 “A” strain by PCR. This filly was euthanized on February16, 2018. Exposed horses in Barn 10 at Belmont Park continue to be quarantined and monitored. An epidemiological investigation has been initiated. State animal health officials and racing officials continue to monitor the situation.