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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.


January 13, 2017
Equine Herpes Viruses
Oldham County, KY
Outbreak Update
Results of testing done on horses on the second Oldham County premises did identify 5 additional horses to be positive by PCR on the nasal swab. As was the first case in this investigation, the strain of EHV1 identified is the ‘wild strain’, not the mutated strain. Testing of the each blood sample was reported neg by PCR. The 5 positive horses were removed from the barn and placed in a separate isolation early this morning (1/13/17). Monitoring of horses in the other barns continues, and there has been no evidence discovered suggesting the virus has spread to other barns or areas on the premises. Health monitoring of the population continues and individual reports assessed daily.
January 13, 2017
Equine Herpes Viruses
Oldham County, KY
Outbreak Update
As of 1/13/2017 there have been no additional cases found at the first Oldham County premises since the last cases diagnosed on 1/6. Daily monitoring continues and the reports show no significant findings. There have been 4 horses on Premises 1 identified as positive, and in all cases the mutated strain of virus was identified. Traces from Premises 1 were conducted and did result in 2 additional horses being identified as positive. Each of these horses are on private facilities. Both of the positive horses and their cohorts remain isolated and monitoring continues.
January 13, 2017
Equine Herpes Viruses
New Orleans, LA
Outbreak Update
On Tuesday, January 10, 2017 two suspect horses that had previously tested negative for EHV-1 on both nasal and blood samples retested positive for EHV1 non-neuropathogenic strain at the LA Animal Disease Diagnostic Lab (LADDL). One of the horses retested negative on blood but positive on nasal samples. The other was positive on both blood and nasal samples. Another new febrile horse from barn 30 tested positive for EHV1 non-neuropathogenic strain on both blood and nasal samples. All 3 horses have been placed into isolation and the barns are under quarantine. On January 12, 2017, a horse in Barn 20 spiked a temperature of 104 and test results on blood and nasal samples are reported negative and retesting protocols will be followed. Three barns were tested for future quarantine release on Wednesday and results are as follows: Nine (9) horses in Barn 36, nineteen (19) horses in Barn 14 and two (2) horses in the Receiving Barn have been reported positive for EHV1 non-neuropathogenic strain. To date, test results report that thirty-eight (38) horses tested positive for EHV1 non-neuropathogenic strain and two (2) tested positive for EHV1 neuropathogenic strain. Sixty-five (65) horses that were potentially exposed to EHV-1 in a receiving barn prior to January 2nd have been traced, isolated and are currently in the testing process. The entire premise of the Fair Grounds Racetrack was placed under quarantine with racing still allowed with barns not symptomatic or test positive. Louisiana Department of Agriculture & Forestry, USDA, and Racing Commission veterinarians continue to work with track personnel in responding to the incident at the Fair Grounds.
January 13, 2017
Strangles
Union County, FL
Confirmed case(s): Official Quarantine
On January 13, one premise in Union County, Florida was placed under quarantine for strangles after PCR results returned positive for 3 of the thirteen horses on the property. All three horses had recently performed at a roping event in Trenton, Florida over the New Year’s weekend. All horse owners that attended this event are encouraged to monitor their horses closely for signs of strangles, isolate febrile horses and report clinical signs to the Florida Department of Agriculture. Clinical signs for the three positive horses began January 5 and the case was reported to the state on January 12. No equids have left the facility since clinical signs began. This is the first case for Union County and Florida’s second case in 2017.
January 13, 2017
Equine Infectious Anemia
Illinois, United States
Confirmed case(s): Official Quarantine
Illinois State Veterinarian’s Office received positive EIA test results from a horse stabled in Northeast Illinois in mid-November. Prior to the results being returned, the horse was removed from the premises and has been lost to follow-up. USDA Investigative and Enforcement Services is involved in the case. The premises was quarantined. Additional testing of equine on the premises disclosed one additional positive animal. That animal has been euthanized. The remaining animals were negative for EIA.
January 12, 2017
Equine Herpes Viruses
Kentucky, United States
Information Only
There is not, nor has there been, any veterinary facility quarantined in association with the recent diagnosis of equine herpesvirus in KY.
January 12, 2017
Equine Herpes Viruses
Oldham County, KY
Outbreak Update
Results of testing for the EHV-1 outbreak initially reported on 1/7/17 in Oldham County identified two additional horses positive for EHV-1. In addition, the horse that had spiked a fever late last week, tested positive to the same virus type (neuropathogenic strain). All three of these horses were moved from their stabling area and placed in the isolation unit and none of remaining horses in the barn were positive for EHV-1. Subsequently, the horse that had fever presented with neurological abnormalities on Monday and was moved to isolation at a veterinary hospital for treatment where it continues to improve. All horses that had left the facility have been located and testing completed. Two horses that had moved were identified as positive. These horses are in isolation on private facilities and are being monitored with the established protocol.
January 12, 2017
Equine Herpes Viruses
Oldham County, KY
Confirmed case(s): Official Quarantine
After developing a fever on 1/9/2017, one horse residing on a premises different from the original premises in Oldham County tested positive for EHV1 (wild type). There have been no neurologic abnormalities seen. The affected horse on this new premises was moved to an isolation barn when fever was detected and plans are in place to remove him from the premises tomorrow. The barn where this horse resided was placed under order of quarantine by the Kentucky Department of Agriculture (KDA). All the horses’ temperatures in all barns on the premises are being monitored and recorded daily. KDA has and will continue to have personnel on the grounds monitoring activity. Samples (nasal swabs and whole blood) were collected from each horse residing in the affected barn and those samples were submitted to the laboratory for EHV-1 testing. Although this is the second premises currently under quarantine are in Oldham County, different strains of the virus are involved. There is no evidence that this case is related to the initial outbreak reported on 1/7/17.
January 10, 2017
Equine Herpes Viruses
Los Angeles Equestrian Center, CA
Outbreak Update
As of January 10, 2017 there are no new cases of Equine Herpesvirus Myeloencephalopathy (EHM) at the Los Angeles Equestrian Center. One horse remains in quarantined isolation awaiting prescribed negative testing. For background information go to: https://www.cdfa.ca.gov/ahfss/animal_health/equine_herpes_virus.html
January 10, 2017
Equine Herpes Viruses
Los Angeles County, CA
Confirmed case(s): Official Quarantine
A case of Equine Herpesvirus Myeloencephalopathy (EHM) has been confirmed on a new Los Angeles County premises. A 12-year-old Quarter Horse mare displaying severe neurologic signs has been confirmed positive for the wild type (non-neuropathogenic) Equine Herpesvirus-1 in the nasal swab and blood. Due to the severity of clinical signs the horse was euthanized. This horse has been classified as a case of EHM which requires regulatory action. The premises of 56 exposed horses in Los Angeles County has been placed under quarantine and all horses are being monitored for clinical signs with twice daily temperature monitoring. One additional 32 year-old horse on the property displaying a fever tested positive today for the wild type of EHV-1 in the nasal swab and blood. This horse has been placed in isolation on site. CDFA staff onsite have implemented enhanced biosecurity measures and has begun the epidemiologic investigation. For more information go to: https://www.cdfa.ca.gov/ahfss/animal_health/equine_herpes_virus.html