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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
November 29, 2016 Strangles Levy and Citrus Counties, FL Confirmed case(s): Quarantine
On November 28 and 29, one premise in Levy and one premises in Citrus County, Florida were reported to the state veterinarians office and placed under quarantine for strangles. Clinical signs began November 17 and 24 respectfully. No animals have left the facility since clinical signs began. This is the second case in Levy County, the first case in Citrus County and the 23rd case for Florida in 2016.
November 28, 2016 Equine Herpes Viruses Los Angeles County, CA Outbreak Update
On November 27, 2016 a febrile horse from one of the quarantined barns in the LAEC was moved to isolation Wednesday evening. Nasal swab was negative on diagnostic testing at CAHFS laboratory—this horse was retested today. Quarantined isolation is now home to nine (9) horses and all nine (9) are confirmed PCR test negative on nasal swab. Enhanced biosecurity measures are in place in all barns under quarantine and all horses’ temperatures continue to be monitored twice daily. CDFA staff continue to provide oversight in working closely with management, trainers and owners at LAEC. The updates on this EHV-1 incident will continue on a 48 hour basis. The quarantine release date will be re-evaluated based on pending test results of the most recent febrile horse at LAEC.
November 25, 2016 Equine Herpes Viruses Los Angeles County, CA Outbreak Update
On November 25, 2016 An owner who violated quarantine with a confirmed febrile EHM horse, trailered the horse to an offsite premises. A quarantine was issued for this confirmed positive EHM horse and this quarantine violation will be pursued to the full extent of our quarantine authority laws. A febrile horse from one of the quarantined barns in the LAEC was moved to isolation Wednesday evening. Nasal swab and blood diagnostic samples were taken and sent to CAHFS laboratory—results are expected on Saturday. Quarantined isolation is now home to nine (9) horses and eight (8) of the nine (9) are confirmed PCR test negative on nasal swab and blood testing. Enhanced biosecurity measures are in place in all barns under quarantine and all horses’ temperatures continue to be monitored twice daily. CDFA staff continue to provide oversight in working closely with management, trainers and owners at LAEC. The updates on this EHV-1 incident will continue on a 48 hour basis. The quarantine release date will be re-evaluated based on pending test results of the most recent febrile horse at LAEC.
November 23, 2016 Equine Herpes Viruses Los Angeles County, CA Confirmed case(s): Quarantine
There was a new febrile horse with mild neurologic deficits at Los Angeles Equestrian Center (LAEC) yesterday in one of the quarantined barns. Diagnostic samples were sent to CAHFS laboratory for testing and results are positive for non-neuropathogenic EHV-1. The owner of the febrile horse violated quarantine and trailered this horse to an offsite home premises. A quarantine has been issued for the offsite premises and this quarantine violation will be pursued to the full extent of our quarantine authority laws. There are no other new febrile horses or confirmed clinical EHV-1 horses at the LAEC. Quarantined isolation is now home to eight (8) horses and all eight (8) are PCR test negative on nasal swab and blood testing. Enhanced biosecurity measures are in place in all barns under quarantine and all horses’ temperatures continue to be monitored twice daily. CDFA staff continue to provide oversight in working closely with management, trainers and owners at LAEC. The updates on this EHV-1 incident will continue on a 48 hour basis. The new febrile case has extended the quarantine release date to December 6, 2016, assuming no new EHV-1 cases and adherence to the terms of the quarantine.Go to: https://www.cdfa.ca.gov/ahfss/animal_health/equine_herpes_virus.html
November 22, 2016 Equine Herpes Viruses Broward County, FL Quarantine Released
As of November 21, 2016, Gulfstream Park has been released from quarantine for EHV. The quarantine was released after all horses in the high risk barns tested negative for the virus on blood and nasal swabs and no additional EHV-1 cases were detected during the quarantine period. For more information please visit http://www.FreshFromFlorida.com/ai/ and look under the announcement section.
November 22, 2016 West Nile Virus Woods and Atoka Counties, OK Confirmed Case(s): No Quarantine
The Oklahoma Department of Agriculture has reported their 13th and 14th cases of West Nile Virus for 2016. A yearling QH stallion located in Woods County was showing severe neurologic signs and died within 24 hours. The horse was vaccinated for WNV. An adult QH mare located in Atoka County was showing severe neurologic signs and was euthanized. The horse was not vaccinated WNV. For more information visit: http://www.ag.ok.gov
November 21, 2016 Equine Herpes Viruses Los Angeles County, CA Outbreak Update
There were no new febrile horses or confirmed clinical EHV-1 horses today at the Los Angeles Equine Center (LAEC). Quarantined isolation is now home to ten (10) horses and all ten (10) are now PCR test negative on nasal swab and blood testing. Enhanced biosecurity measures are in place in all barns under quarantine and all horses’ temperatures continue to be monitored twice daily. CDFA and staff continue to provide oversight in working closely with management, trainers and owners at LAEC. The updates on this EHV-1 incident will continue on a 48-hour basis. December 2, 2016 is the potential quarantine release date assuming no new EHV-1 cases and adherence to the terms of the quarantine (no movement off-site from LAEC quarantined barns and twice a day temperature monitoring of all horses under quarantine).
November 21, 2016 Equine Herpes Viruses Los Angeles County, CA Outbreak Update
On November 20, 2016 there were no new febrile horses or confirmed clinical EHV-1 horses at the Los Angeles Equestrian Center. Quarantined isolation is now home to ten (10) horses as one of the eleven (11) in quarantined isolation from yesterday qualified to move back to home quarantined stall based on two weeks of negative EHV-1 nasal swab and blood testing. One of the ten (10) remaining horses in isolation continues to PCR test positive on nasal swab and the other ten (10) are now PCR test negative on nasal swab and blood testing. Enhanced biosecurity measures are in place in all barns under quarantine and all horses’ temperatures continue to be monitored twice daily. CDFA and USDA staff continue to provide oversight in working closely with management, trainers and owners at Los Angeles Equestrian Center.
November 15, 2016 Equine Herpes Viruses Los Angeles County, CA Outbreak Update
There were no new clinical EHV-1 horses moved to quarantined isolation today at the LAEC. Currently, quarantined isolation is home to twelve (12) horses. To date, there have been seven confirmed cases of Equine Herpesvirus-1 Myeloencephalopthy (EHM), one of which was euthanized due to the severity of the disease. The six neurologic cases and four confirmed EHV-1 positive horses continue to show improvement and remain in isolation. In addition, two febrile horses in isolation have twice tested negative and will continue to be monitored in isolation. Enhanced biosecurity measures are in place in all barns under quarantine and all horses’ temperatures are monitored twice daily. CDFA veterinarians, livestock inspectors and USDA animal health technicians continue to monitor the quarantine and incident situation on-site and will provide additional updates as they become available.
November 14, 2016 Equine Herpes Viruses Los Angeles County, CA Outbreak Update
On November 14, 2016 one horse at the Los Angeles Equestrian Center (LAEC), displaying a fever yesterday and placed in quarantined isolation, has been confirmed positive for non-neuropathogenic EHV-1 today. Additionally, the two febrile horses which tested negative on November 10, 2016, were re-sampled yesterday and testing confirmed negative status. Currently, quarantined isolation is home to twelve (12) horses. To date, there have been seven confirmed cases of Equine Herpesvirus-1 Myeloencephalopthy (EHM), one of which was euthanized due to the severity of the disease. The remaining six neurologic cases are showing improvement and remain in isolation. Enhanced biosecurity measures are in place in all barns under quarantine and all horses’ temperatures are monitored twice daily. CDFA veterinarians, livestock inspectors and USDA animal health technicians continue to monitor the quarantine and incident situation on-site and will provide additional updates as they become available.