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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.


August 31, 2018
West Nile Virus
Lewis County, KY
Confirmed Case(s): No Quarantine
Source: Office of the Kentucky State Veterinarian

The Office of the Kentucky State Veterinarian has confirmed a case of equine west Nile virus in Lewis County. A 6-year-old Tennessee Walking Horse stallion with no WNV vaccination history showed an onset of clinical signs on August 28th, 2018. The horse was found in the morning down in his stall and was able to rise with assistance. The horse went back down that night, was unable to rise, and was euthanized. This is Kentucky’s 2nd confirmed case of equine WNV.

August 31, 2018
West Nile Virus
Canyon County, ID
Confirmed Case(s): No Quarantine
Source: Idaho State Veterinarian

The Idaho State Veterinarian has confirmed a case of West Nile Virus in a horse at a private facility in Canyon County. An unvaccinated two-year-old Quarter Horse filly showed an onset of clinical signs on August 27th, 2018 including facial and muscle fasciculations and grade 2/5 ataxia in all four limbs. WNV was confirmed at the ISDA Animal Health Laboratory on ELISA. This is Idaho’s fourth confirmed case of equine WNV.

 

August 31, 2018
West Nile Virus
Washington County, MD
Confirmed Case(s): No Quarantine
Source: Maryland State Veterinarian

The Maryland State Veterinarian has confirmed a case of equine West Nile virus in a horse in Washington County which showed an onset of neurological signs on August 27th, 2018. Testing was done by Cornell Animal Diagnostic Laboratory and WNV was confirmed on August 30th, 2018. The horse is recovering and was not vaccinated for WNV.

August 31, 2018
West Nile Virus
Lorain and Wayne Counties, OH
Confirmed Case(s): No Quarantine
Source: Ohio State Veterinarian’s Office

The Ohio State Veterinarian’s Office confirmed three additional cases of equine West Nile virus. A 22-year-old Paint mare from Lorain County first showed sign on 08/21/2018 with clinical signs of lack of appetite. Symptoms progressed to ataxia, urinary incontinence and by the morning of 08/22/2018 the horse was unable to stand on its own. After being down for 24 hours the decision was made to euthanize the horse on 08/22/2018. A serum sample was collected that day and was positive for IgM antibody by capture ELISA assay. The horse had not been vaccinated. a 5-year-old Miniature mare, also from Lorain County, first showed signs on 08/20/2018 at the Lorain County Fair. The clinical signs included tremors, stiffness, and the horse was clumsy. The horse was sent home from the fair on 08/21/2018. Blood was drawn for analysis and the horse was treated with Banamine. The serum sample collected was positive for IgM antibody by capture ELISA assay. The horse was not vaccinated and appeared to be recovering as of 08/29/2018. A 2-year-old Standardbred gelding from Wayne County first showed signs on 08/22/2018 including a low-grade temperature, incoordination, twitching, and appeared to be neurologic. The veterinarian collected a serum sample which was sent to NVSL 08/22/2018. The horse was treated and appeared to be recovering as of 08/29/2018. The serum sample was submitted to NVSL, which reported an IgM capture ELISA titer of 1:400 or greater, suggesting recent exposure to West Nile virus.

August 31, 2018
Eastern Equine Encephalitis
Camden County, NJ
Confirmed Case(s): No Quarantine
Source: New Jersey State Veterinarian

The New Jersey State Veterinarian has confirmed a case of Eastern Equine Encephalitis in a 12-year-old Camden County gelding. This is the second reported case in New Jersey in 2018 of EEE. The horse had not been vaccinated against EEE and was euthanized on August 27.

August 30, 2018
West Nile Virus
Anne Arundel and Carroll County, MD
Confirmed Case(s): No Quarantine
Source: Maryland Department of Agriculture

The Maryland Department of Agriculture confirmed two positive cases of West Nile Virus in Maryland. One horse in Anne Arundel County showed an onset of neurological clinical signs, responded to supportive treatment and has recovered. One horse in Carroll County showed an onset of severe neurological clinical signs on August 26th, 2018 and was euthanized; WNV was confirmed by Maryland Department of Health's Arbo Lab on August 30th, 2018. Both horses had not been vaccinated for WNV.

August 29, 2018
West Nile Virus
Pendleton County, KY
Confirmed Case(s): No Quarantine
Source: Office of the Kentucky State Veterinarian

The Office of the Kentucky State Veterinarian has confirmed a case of equine West Nile Virus in Pendleton County. An unvaccinated, 9-year-old Quarter Horse gelding showed an onset of clinical signs on August 23rd, 2018 including lower lip paresis and muscle fasciculations. During the following 48 hours, the horse showed a progressive rear ataxia and became recumbent unable to rise. The horse remained hospitalized under treatment and continues to improve. As of August 28th, gelding was found to be bright, alert, responsive (BAR), able to rise with assistance, stand, is eating and drinking well and described as being in stable condition with a favorable prognosis. Diagnostic testing completed and reported on August 28th , 2018 confirms the first equine West Nile virus (WNv) diagnosed in Kentucky this calendar year. The diagnosis is based on detectable WNv specific IgM antibody and compatible clinical symptoms.

August 29, 2018
West Nile Virus
Kent County, DE
Confirmed Case(s): No Quarantine
Source: Office of the Delaware State Veterinarian

The Office of the Delaware State Veterinarian has confirmed two cases of West Nile Virus in Kent County. A 3-year-old Standardbred mare at a private facility showed an onset of clinical signs on August 19th, 2018 including ataxia. Diagnostic testing at the National Veterinary Services Laboratory confirmed WNV. The vaccination status of the horse is unknown. An unvaccinated 2-year-old Thoroughbred filly at a private facility showed an onset of clinical signs on August 24th, 2018 including fever, mild ataxia, pharyngeal paralysis, flaccid tongue, inability to swallow a nasogastric tube, and a stuporous demeanor. The horse is receiving treatment.

August 29, 2018
Equine Infectious Anemia
Weld County, CO
Confirmed case(s): Official Quarantine
Source: Office of the Colorado State Veterinarian

The Office of the Colorado State Veterinarian has confirmed a case of Equine Infectious Anemia in Weld County. A 5-year-old grade gelding at a private facility was confirmed positive through routine testing on ELISA at the National Veterinary Services Laboratory. A quarantine was established on August 24th, 2018. For more information go to https://www.colorado.gov/pacific/agmain/news/8282018-eia-positive-horse-identified-colorado

August 29, 2018
West Nile Virus
Jerome County, ID
Confirmed Case(s): No Quarantine
Source: Idaho State Veterinarian

The Idaho State Veterinarian has confirmed a case of West Nile Virus in Jerome County. A 10-year-old Quarter Horse stallion at a private facility showed an onset of neurological signs on August 24th, 2018 including ataxia, subsequent recumbency and inability to rise. PCR on blood at University of California Davis confirmed WNV. Vaccination status is unknown and the horse was euthanized. This is Idaho's 3rd confirmed case of equine WNV in 2018.