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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.

Alert ID: 1528
November 21, 2019
Strangles
Providence County, RI
Confirmed case(s): Official Quarantine
Source: Rhode Island State Veterinarian

Number Confirmed: 1;
Number Exposed: 47;
Clinical Signs: Coughing, Fever, Nasal Discharge, Lymphadenopathy;  Horse Status: Affected And Alive; Vaccination Status: Status Unknown;
Notes: A 40+ horse boarding facility in Providence County, RI began experiencing mild respiratory disease in mid-September. Signs were mild fever, nasal discharge and cough. There are several attending veterinarians for the stable and one was consulted. This veterinarian obtained nasopharyngeal samples from 3 horses and submitted them for a respiratory panel where Equine Rhinovirus-B was discovered in 2 horses and Streptococcus equi zooepidemicus in all three. The farm owner separated the sick horses from well ones until the sick ones were clinically normal for greater than a week (all horses had temps monitored twice daily). Upon reintroducing the horses that were formerly showing signs, the well horses began showing similar signs with some also experiencing lymphadenitis and lymphadenopathy. To date approximately 26 horses have experienced some respiratory signs and 21 have not. A second veterinarian examined a single horse with the aforementioned signs and she obtained a nasopharyngeal sample that was qPCR positive for EHV-4 and Streptococcus equi equi. Upon this diagnosis the state veterinarian issued an order of quarantine. The owner had been maintaining strict biosecurity prior to the new diagnosis but two horses left the property to go to another boarding facility in the same town. There was no quarantine in place when they moved. There is no known disease at that farm and those horses moved about 3 weeks prior to the diagnosis of S. equ and EHV-4. ;

Alert ID: 1527
November 21, 2019
Equine Herpesvirus- Neurologic
Montgomery County, VA
Confirmed case(s): Official Quarantine
Source: State Veterinarian’s Office of the Virginia Department of Agriculture and Consumer Services

Number Confirmed: 1;
Age: 20; Gender: Mare; Breed: Thoroughbred (TB); Onset of Clinical Signs: 11/17/2019;
Clinical Signs: Ataxia, Recumbency, Vestibular; Confirmation Date: 11/20/2019; Horse Status: Euthanized; Vaccination Status: Vaccinated;
Notes: In conjunction with the State Veterinarian’s Office of the Virginia Department of Agriculture, all exposed horses at the hospital were immediately isolated from the rest of the hospital population with strict biosecurity protocol and placed under quarantine. All quarantined horses are being monitored twice daily for fever (temperature over 101.50 F) and other clinical signs. The hospital remains open and able to admit patients needing veterinary care. The farm where the index case resided before going to VMCVM has been placed under quarantine. Horses at this farm are also being monitored for fever and clinical signs. The State Veterinarian’s Office has contacted all other horses that may have been secondarily exposed while at the teaching hospital.;

Alert ID: 1526
November 21, 2019
Equine Herpesvirus- Neurologic
Municipality of Wallace-Woodworth, MB
Confirmed Case(s): Voluntary Quarantine
Source: Attending Veterinarian

Number Confirmed: 1;
Number Exposed: 86;
Age: 13; Gender: Mare; Breed: Quarter Horse (QH); Onset of Clinical Signs: 11/10/2019;
Clinical Signs: Ataxia, Recumbency, Unable to Rise; Confirmation Date: 11/14/2019; Horse Status: Euthanized; Vaccination Status: Vaccinated;
Notes: On Nov 8, 2019, a 7yo QH mare died less than 24 hours after acute onset of recumbency and inability to rise. On Nov 11, a 13 year old pregnant QH mare was euthanized on the same location due to advancing severity of neurological signs (first noticed on Nov 10) and was later confirmed positive by PCR for EHV-1. The mares were stabled with 38 other horses, and a total of 86 horses of various ages and genders are on site. The affected mares were vaccinated for the prevention of EHV-1 abortion approximately 1 week prior to onset of clinical signs and were approximately 5 months along in gestation. As of Nov 21, no new cases/symptoms have been reported on the site. A voluntary quarantine is in place, and to date there is no indication that EHM has spread from the affected premises.;

Alert ID: 1525
November 20, 2019
Equine Influenza
Spokane County, WA
Confirmed Case(s): Voluntary Quarantine
Source: Washington State Veterinarian

Number Confirmed: 2;
Number Exposed: 40;
Age: 7; Gender: Gelding; Breed: Thoroughbred (TB);  

Age: 5; Gender: Mare; Breed: Warmblood (WB);

Onset of Clinical Signs: 11/10/2019; Clinical Signs: Coughing, Fever, Nasal Discharge; Confirmation Date: 11/15/2019; Horse Status: Recovering; Vaccination Status: Undervaccinated;
Notes: Multiple veterinarians at farm. Reporting veterinarian was going to talk to management and place quarantine as there appears to be other horses sick after a local show.;

Alert ID: 1524
November 20, 2019
Equine Herpesvirus- Neurologic
San Bernardino County, CA
Outbreak Update
Source: California Department of Food and Agriculture

Number confirmed: 8

Number euthanized: 3

Number exposed (non-clinical): 13

Notes: One of the confirmed EHV-1 positive febrile horses on the index premise developed severe neurologic signs and was euthanized on Saturday November 16. One additional exposed horse on the index premise, a 24-year-old Quarter horse mare, exhibiting neurological signs has been confirmed positive for EHV-1. Two additional febrile horses, a 22-year-old Paint mare and an 11-year-old Paint mare, have also been confirmed positive for EHV-1. CDFA is onsite to observe biosecurity protocols and isolation of positive horses.

 

Alert ID: 1523
November 18, 2019
Equine Herpesvirus- Neurologic
Chester County, PA
Quarantine Released
Source: Pennsylvania Department of Agriculture

Notes: Following 21 days with no additional cases of EHV-1 infection identified in any of the other horses at the fox hunting and boarding stables in Chester County, PA, the Order of Special Quarantine posted on October 29, 2019 at that premises has been revoked. The only case of EHV-1 identified remains the index EHM patient.

Alert ID: 1522
November 15, 2019
Equine Herpesvirus- Neurologic
Remington Park Racetrack, Oklahoma County, OK
Confirmed case(s): Official Quarantine
Source: Oklahoma Department of Agriculture

Number Confirmed: 1;
Number Exposed: 66;
Age: 3; Gender: Mare; Breed: Thoroughbred (TB); Onset of Clinical Signs: 11/12/2019;
Clinical Signs: Acute Onset, Ataxia, Fever, Recumbency, Unable to Rise; Confirmation Date: 11/14/2019; Horse Status: Euthanized; Vaccination Status: Status Unknown;
Notes: A 3 yr old TB filly at the Remington Park Racetrack, in Oklahoma County was euthanized due to severity of neurologic signs and was confirmed positive by PCR for EHV-1. The horse was stabled at Remington Park. One barn with 66 exposed horses has been quarantined. ;

Alert ID: 1521
November 15, 2019
Eastern Equine Encephalitis
Beaufort County, SC
Confirmed Case(s): No Quarantine
Source: South Carolina State Veterinarian

Number Confirmed: 1;
Age: 5; Gender: Gelding; Breed: Grade;  Horse Status: Desceased; Vaccination Status: Unvaccinated;
Notes: 2019 EEE County Summary-Chesterfield – 1, Marlboro – 1, Sumter – 1, Beaufort - 1;

Alert ID: 1520
November 15, 2019
Equine Herpesvirus- Neurologic
San Bernardino County, CA
Outbreak Update
Source: California Department of Food and Agriculture

Notes: One additional horse, a 22-year-old Paint gelding, has been confirmed positive for EHV-1 myeloencephalopathy on the index premise. The horse was euthanized due to the severity of clinical signs. Three additional febrile horses on the premise have also been confirmed positive for EHV-1. CDFA continues to monitor the situation. ;

 

Alert ID: 1519
November 15, 2019
Vesicular Stomatitis
Platte County, WY
Confirmed case(s): Official Quarantine
Source: United States Department of Agriculture

Notes: The USDA Animal and Plant Health Inspection Service has released a new situation report on November 14, 2019 confirming vesicular stomatitis in 1 new premises in Platte County Wyoming.  For more information go to https://www.aphis.usda.gov/animal_health/downloads/animal_diseases/vsv/sitrep-11-14-19.pdf