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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 09, 2017 West Nile Virus Moravia (Cayuga County), Avon (Livingston County), Altmar (Oswego County), Rensselaer Falls (St. Lawrence County) and Macedon (Wayne County, NY Confirmed Case(s): No Quarantine
Source: New York State Department of Agriculture

The New York State Department of Agriculture confirmed 5 cases of West Nile Virus. The horses ranged from 2 to 22-years old, and none were recently vaccinated. The horses were located in Moravia (Cayuga County), Avon (Livingston County), Altmar (Oswego County), Rensselaer Falls (St. Lawrence County) and Macedon (Wayne County). Three horses are alive and 2 were euthanized.

November 06, 2017 West Nile Virus Calumet County, WI Confirmed Case(s): No Quarantine
Source: Wisconsin Department of Agriculture, Trade, and Consumer Protection

The Wisconsin Department of Agriculture, Trade, and Consumer Protection have reported a case of equine West Nile Virus. A 19-year-old Paint gelding from Calumet County showed swollen limbs and decreased anal tone on 10/24/17.  He initially tested positive for Anaplasmosis and was treated at the veterinary clinic and later went home.  He then became more neurologic and returned to the clinic on 10/30/17.  That’s when they tested him for WNV and he was positive via IgM Capture ELISA.  The horse was vaccinated in 3/17 and has been vaccinated every year for many years, according to the clinic.  He has gone home again and is recovering. This case is confirmed equine WNV case #23 in WI for 2017.

November 03, 2017 West Nile Virus Dorchester, Spartanburg Counties, SC Confirmed Case(s): No Quarantine
Source: South Carolina State Veterinarians Office

The South Carolina State Veterinarian’s office confirmed 2 West Nile Virus in two horses one in Dorchester and Spartanburg Counties. the 11-year old miniature horse in Dorchester County had an unknown vaccination status an died. In Spartanburg County, an unvaccinated 26-year old Tennessee Walking Horse was euthanized.

November 03, 2017 Eastern Equine Encephalitis Horry County, SC Confirmed Case(s): No Quarantine
Source: South Carolina State Veterinarian's Office

The South Carolina State Veterinarian’s office confirmed EEE in a horse in Horry County (Myrtle Beach area). This 7-year old Quarter Horse with unknown vaccination status was euthanized.

November 02, 2017 Eastern Equine Encephalitis Bladen County, NC Confirmed Case(s): No Quarantine
Source: North Carolina Department of Agriculture and Consumer Services

The North Carolina Department of Agriculture and Consumer Services recently confirmed the fifth and sixth positive cases of Eastern Equine Encephalitis for 2017. The cases were discovered in a 6-year-old mare pony in Bladen County and a 5-yearold gelding American Quarter horse in Camden County. Both animals had no vaccination history. For more information go to http://www.ncagr.gov/paffairs/release/2017/TroxlerencourageshorseownerstovaccinateagainstEEE_000.htm

October 31, 2017 Eastern Equine Encephalitis District of Muskoka, ON Confirmed Case(s): No Quarantine
Source: Ontario Ministry of Agriculture, Food and Rural Affairs

A second case of EEE was confirmed by the Ontario Ministry of Agriculture Food and Rural Affairs the week of October 23, 2017. The 19-year old mixed breed mare, 11 months pregnant and unvaccinated for EEE was from the District of Muskoka. Neurological signs began as muscle tremors and hind end weakness and progressed rapidly to recumbency. The mare was euthanized.  This is the second confirmed case of EEE in Ontario in 2017.

October 31, 2017 West Nile Virus Frontenac County, ON Confirmed Case(s): No Quarantine
Source: Ontario Ministry of Agriculture, Food and Rural Affairs

Since October 19, 2017, 3 cases of West Nile Virus in Frontenac County, Oxford County and the Regional Municipality of Halton have been reported to the Ontario Ministry of Agriculture, Food and Rural Affairs. The horses included a gelding, a filly and a mare with ages ranging from 2 to 11 years. Clinical signs ranged from hind end weakness, muscle fasciculations and hyperesthesia to ataxia. All three are recovering under veterinary supervision. One horse was unvaccinated,  one had not been vaccinated for three years, and one four-year-old had been vaccinated yearly since it was two. The total number of cases reported in Ontario in 2017 is 21.

http://www.omafra.gov.on.ca/english/livestock/horses/facts/nhd_surv2017.htm

http://www.omafra.gov.on.ca/french/livestock/horses/facts/nhd_surv2017.htm

October 30, 2017 Eastern Equine Encephalitis Marathon County, WI Confirmed Case(s): No Quarantine
Source: Wisconsin Department of Agriculture, Trade, and Consumer Protection

The Wisconsin Department of Agriculture, Trade, and Consumer Protection has confirmed a case of Eastern Equine Encephalitis in Marathon County.  An unvaccinated 17-year-old Appaloosa cross mare went down on 10/20/17.  The attending veterinarian saw the mare on 10/20/2017.  He reported that she had been high-stepping and star-gazing prior to recumbency.  In recumbency, he reported that she was twitching and acting delirious.  The veterinarian sampled and treated her with anti-inflammatories and steroids; he said she got up and was showing neurologic signs, but is recovering. This is the 24th case of EEE reported in Wisconsin in 2017.

October 30, 2017 West Nile Virus Clark County, WI Confirmed Case(s): No Quarantine
Source: Wisconsin Department of Agriculture, Trade, and Consumer Protection

The Wisconsin Department of Agriculture, Trade, and Consumer Protection has confirmed a case of Equine West Nile Virus in a 7-year-old unvaccinated Quarter Horse mare from Clark County.  She showed minor neurologic signs on 10/21/17 (lip droop, slight incoordination). She went down on 10/22/17 but got back up.  On 10/23/17, she went down again and a local veterinarian was called.  He sampled and treated her, but she died a couple of days later.  NVSL performed the laboratory diagnostic tests. This is the 22nd case of equine WNV reported in Wisconsin in 2017.

October 27, 2017 West Nile Virus Licking, Columbiana, Ashland, Counties, OH Confirmed Case(s): No Quarantine
Source: Ohio Department of Agriculture

The Ohio Department of Agriculture confirmed West Nile Virus in the 12th 13th and 14th  Ohio horses. The 12th horse was from Utica, Ohio in Licking County, and was first seen sick on 10/6/17, with limited clinical data available as of 10/27/17. The 13th horse was from Negley, Ohio in Columbiana County (second confirmed case), a 5-year old Percheron gelding that presented on 10/15/17 with acute onset of ataxia, weakness in the rear limbs and a temperature of 101 F. Outcome and vaccine status is pending. The 14th horse was from Loudonville, Ohio in Ashland County, a 6-month old Haflinger colt who had an onset of illness on 10/18/17 with clinical signs including ataxia of all 4 limbs, slight depression and fell over when led. The next day it was in flat recumbency and the owner elected euthanasia. The horse was not vaccinated against WNV.