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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 20, 2018
West Nile Virus
Kern, Placer, and Sacramento Counties, CA
Confirmed Case(s): No Quarantine
Source: California Department of Food and Agriculture

The California Department of Food and Agriculture, reports four additional equines displaying neurologic signs were confirmed positive for West Nile Virus. For 2018, a total of five (5) horses have been confirmed positive for West Nile Virus. The positive horses are located in Kern, Placer, Sacramento (2) and Shasta counties. Three (3) horses were unvaccinated and two (2) horses were vaccinated. Three (3) horses died or were euthanized and two (2) horses are alive. CDFA continually monitors and investigates equine neurologic cases for the presence of WNV in California. CDFA urges horse owners to consult their veterinarian concerning a WNV vaccination program to ensure maximum protection of their horses. For more information visit https://www.cdfa.ca.gov/ahfss/animal_health/WNV_Info.html .

August 18, 2018
West Nile Virus
Larimer County, CO
Confirmed Case(s): No Quarantine
Source: Colorado Department of Agriculture

The Colorado Department of Agriculture confirmed the first case of West Nile Virus in Colorado for 2018. The index case was diagnosed by Colorado State University Veterinary Diagnostic Laboratory on August 15, 2018.

August 17, 2018
West Nile Virus
Howard County, IA
Confirmed Case(s): No Quarantine
Source: Iowa State Veterinarian

The Iowa State Veterinarian has confirmed a case of West Nile virus in Howard County. An unvaccinated, mixed breed, yearling filly showed an onset of clinical signs on August 10th, 2018 including hind end weakness, ataxia, and fever. WNV was confirmed at the USDA National Veterinary Services Laboratory. The status of the horse is unknown.

August 17, 2018
Strangles
Livingston and Washtenaw Counties, MI
Confirmed Case(s): No Quarantine
Source: Michigan Department of Agriculture and Rural Development

The Michigan Department of Agriculture and Rural Development has confirmed two new cases of strangles. One case is in a two-year-old Quarter Horse gelding from Livingston County. The horse had a history of coughing. The horse underwent endoscopy and was found to have discharge in the guttural pouch. The horse was cultured for strangles on August 7th, 2018 and discharge cultured positive for the bacteria that causes strangles. The horse’s vaccination history is unknown. No quarantines were issued. The second case is in a 16-year-old Quarter Horse gelding from Washtenaw County. The horse developed a sudden onset of coughing, inappetence, fever, and nasal discharge on August 4th, 2018. The horse was not vaccinated against strangles. No quarantines were issued. Another horse at the property was previously confirmed to have strangles in June. These cases bring the total number of cases of strangles in Michigan for 2018 to 14 from the following counties: Chippewa, Clinton, Ionia, Livingston, Montcalm, Shiawassee, St. Clair, Washtenaw, and Wayne.

August 17, 2018
Eastern Equine Encephalitis
Oswego County, NY
Confirmed Case(s): No Quarantine
Source: New York State Department of Agriculture and Markets

The New York State Department of Agriculture and Markets confirmed the state’s first 2018 EEE case in a horse from West Monroe, NY (Oswego Co). The 2-year old gelding started to show signs on August 8, 2018. The gelding was found down in the woods, was blind with a high fever. The horse died the following day. Brain samples submitted along with concurrent signs of illness confirmed an active EEE infection.

August 16, 2018
Eastern Equine Encephalitis
Regional Municipality of Niagara, ON
Confirmed Case(s): No Quarantine
Source: Ontario Ministry of Agriculture, Food and Rural Affairs

On August 13th  and 14th, the Ontario Ministry of Agriculture, Food and Rural Affairs confirmed two cases of Eastern Equine Encephalitis in the Regional Municipality of Niagara. A mare and her foal were euthanized after developing acute and progressive neurological signs (ataxia leading to recumbency). EEE was confirmed through post mortem testing. The mare had been incompletely vaccinated for EEE. These are the third and fourth cases of EEE in Ontario this year. http://www.omafra.gov.on.ca/english/livestock/horses/facts/nhd_surv2018.htm

August 16, 2018
West Nile Virus
Cache County, UT
Confirmed Case(s): No Quarantine
Source: Utah Department of Agriculture and Food

The Utah Department of Agriculture and Food has confirmed a case of West Nile Virus in Cache County. An unvaccinated, 2-year-old Quarter Horse gelding showed an onset of signs on August 12th, 2018 and was euthanized.

August 15, 2018
West Nile Virus
Fauquier County, VA
Confirmed Case(s): No Quarantine
Source: Virginia Department of Agriculture and Consumer Services

The Virginia Department of Agriculture and Consumer Services (VDACS) today announced the state’s first positive case of West Nile Virus (WNV) in a horse this year. The nine-year-old pony mare from Fauquier County tested positive for WNV at VDACS’ regional animal health laboratory in Warrenton and a USDA lab in Iowa. The horse was not vaccinated for WNV and has recovered. Symptoms included loss of control of bodily movements and partial paralysis in the hind limbs, dazed appearance and lack of ability to stand.

 

August 15, 2018
West Nile Virus
Shasta County, CA
Confirmed Case(s): No Quarantine
Source: California Department of Food and Agriculture

On August 14,2018, the California Department of Food and Agriculture confirmed the first equine West Nile Virus case for 2018. An unvaccinated four year old Quarter Horse mare in Shasta County displaying severe neurologic signs was confirmed positive for West Nile Virus. Due to the severity of clinical signs, the mare was euthanized. For more information visit https://www.cdfa.ca.gov/ahfss/animal_health/WNV_Info.html .

August 15, 2018
West Nile Virus
Mitchell and Mahaska Counties, IA
Confirmed Case(s): No Quarantine
Source: Iowa State Veterinarian

The Iowa State Veterinarian has confirmed West Nile Virus in two horses. On August 1, 2018 an unvaccinated 1-year old Percheron colt in Mitchell County was febrile, recumbent and dog sitting. This horse’s current status is unknown. On August 6, 2018 an unvaccinated 3-year old grade mare in Mahaska County was observed stumbling and became recumbent two days later. This horse’s current status is unknown.