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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
June 03, 2015 Equine Herpes Viruses Marion County, OR No Status
May 31, 2015--A new case of Equine Herpes Virus-1 (EHV-1) has been confirmed in Oregon over the weekend according to the Oregon Department of Agriculture. The 14-year old Quarter Horse gelding from Marion County is hospitalized at the Oregon State University College of Veterinary Medicine’s Large Animal Hospital after being admitted for sudden onset of neurologic signs of the disease. The horse has tested positive for both the wild type and the more serious neuropathogenic form of EHV-1. Despite other cases of EHV-1 in Oregon in recent weeks, this detection is being classified as a new case because of the length of time and lack of strong epidemiological links to previous EHV-1 instances. The affected horse has not travelled or attended any shows or events for at least four months. The stable has been quarantined and all horses involved remain under active observation by owners and their veterinarians for clinical signs of disease. Six of the eight quarantines associated with the previous EHV-1 cases have been released and two are pending.
May 31, 2015 Vesicular Stomatitis Utah, UT Quarantine Ended
All fourteen horses and facilities under quarantine following a confirmed case of vesicular stomatitis (VS) was found in a mule at an event in southern Utah on May 1, 2015, have been released and the quarantine has been lifted. “There are no further cases under investigation,” said Dr. Warren Hess, Acting Utah State Veterinarian. Nine of the animals never showed symptoms, five of which were released on Monday, May 11, said Hess. The remaining four horses that were not infected, as well as the five horses that were infected, were inspected and released from quarantine on Thursday, May 14, officially ending the Utah VS quarantine.
May 27, 2015 Strangles Columbia county, FL Ongoing Investigation
May 27, 2015--A new premise in Columbia County, Florida has been confirmed with strangles. Currently one out of the five horses on the property is symptomatic. No horses came onto or left the property for 14 days prior to onset of symptoms which began May 20th. The disease was confirmed by PCR and culture on May 27th. The neighbors of the confirmed premises received a new horse about two weeks prior and they share a common fence. The neighbor has 4 horses on their property and all are a symptomatic and non-febrile at this time. This is the first confirmed case in Columbia County and the 15 incident for Florida since the beginning of the year.
May 24, 2015 Vesicular Stomatitis Reeves County, TX Confirmed case(s): Quarantine
May 22, 2015--The second case of Vesicular stomatitis (VS) in the State has been confirmed in horses in Reeves County, near Orla, Texas (West Texas). This is the first case of VS in Reeves County this year. On May 19, 2015, the Texas Animal Health Commission (TAHC) announced the State’s first case of VS involving three horses in Pecos County. The newly identified infected premises is currently under quarantine by the TAHC. Affected horses will be monitored by regulatory personnel until all lesions have healed and a decision is made to release the quarantine (a minimum of 14 days). There is no known exposure to other horses around the state, or at any equine events. It is believed that the virus overwinters in the sand and black fly population in northern Mexico and then moves northward in warmer weather.
May 22, 2015 Equine Herpes Viruses Kentucky, United States Investigation Initiated
Equine Herpes Myeloencephalopathy: Kentucky’s Perspective and Position Updated: May 21, 2015-- Go
May 21, 2015 Equine Herpes Viruses San Luis Obispo County, CA Confirmed case(s): Quarantine
May 21, 2015 : A 7 year old barrel racing Quarter Horse gelding, originating from San Luis Obispo County, displaying mild hind limb ataxia was confirmed positive for the non-neuropathogenic strain of Equine Herpesvirus-1. This strain of virus is responsible for the more common rhinopneumonitis cases. A small percentage of the non-neuropathogenic infected horses can display neurologic signs compatible with equine herpes myeloencephalopathy which is a reportable disease in California. The quarantined gelding is under veterinary care in Santa Barbara County and is recovering. An investigation has been initiated and owners with potentially exposed horses will be contacted. Owners of exposed horses are asked to monitor their horses for clinical signs and take temperatures twice daily. CDFA will continue to monitor the situation. Go to:
May 19, 2015 Vesicular Stomatitis Pecos County, TX Confirmed case(s): Quarantine
AUSTIN- Vesicular stomatitis (VS) has been detected in three horses at a Pecos County premises located approximately 30 miles north of Fort Stockton, Texas. The animals were tested after the owner observed blistering and swelling on the animals' tongues and lips, and contacted their veterinary practitioner. Testing at the USDA National Veterinary Services lab in Ames, Iowa confirmed the New Jersey serotype of virus in the affected horses. Vesicular stomatitis primarily affects horses and cattle causing blisters or sores on the tongue, lips, muzzle, nose, hooves and/or teats. Because of the contagious nature of VS and its resemblance to other diseases such as foot and mouth disease (FMD), the Texas Animal Health Commission (TAHC) urges livestock owners and caretakers to report these symptoms to their veterinarian or the TAHC immediately. Although the lesions may be painful, most animals recover well with supportive care. VS can be transmitted by direct contact with infected animals, contaminated objects (fomites), or by insect vectors such as sand flies and black flies. The disease usually occurs in warm months of the year when insect vectors are active. VS may also affect people causing a mild flu-like illness with symptoms of fever, weakness, and muscle aches. The newly identified infected horses are currently under quarantine by the TAHC. Affected and exposed horses will be monitored by TAHC or USDA personnel until all lesions have healed and a decision is made to release the quarantine (a minimum of 14 days). "If you suspect your animal(s) have VS, you should notify your veterinarian immediately," said Dr. Dee Ellis, Texas' State Veterinarian and TAHC Executive Director. "Texas had its largest VS outbreak in history last year, and we must remain vigilant in protecting our livestock industry in 2015." The first case of VS this year was found in New Mexico on April 29, 2015. Since then, VS cases have also been confirmed in Arizona and Utah. Some states and other countries may restrict movement of, or impose additional requirements for susceptible species moving from states with active cases of VS. It is important for shippers or haulers of livestock to contact states of destination well in advance of scheduled movements to determine their entry requirements. For international export information, the USDA Veterinary Services office in Austin, Texas should be contacted.
May 19, 2015 Equine Herpes Viruses Forest County, PA Ongoing Investigation
Harrisburg, PA - The Pennsylvania Department of Agriculture today announced a quarantine of an equine barn in Tionesta, Forest County, after a horse at the barn tested positive for Equine Herpesvirus Type 1 (EHV-1) on Wednesday, May 13. A horse from the Forest County barn was used in the Tionesta Wounded Warrior Horseback Scavenger Hunt, where 94 horses took part, including horses from Ohio and West Virginia. An equine barn in Shippenville, Clarion County, housing an exposed horse that showed clinical signs of EHV-1, was put under precautionary quarantine Thursday, May 14, until the pending laboratory results are confirmed. Two additional horses from the Forest County equine barn have shown signs of illness after being exposed to the positive horse. The Pennsylvania Department of Agriculture is in the process of tracing the horses that participated in the scavenger hunt, and has notified animal health officials in Ohio and West Virginia. Clinical signs of the disease can range from respiratory to neurological impairment. In most situations, the disease is only mildly contagious. There is no threat to human health from Equine Herpesvirus. The barns and horses are quarantined for at least 21 days. The quarantine can be lifted after that three-week period. Strict sanitary and biosecurity standards are then enforced. Horse owners with concerns may contact the Department of Agriculture’s Bureau of Animal Health and Diagnostic Services at 717-772-2852.
May 15, 2015 Vesicular Stomatitis Grant County, NM Confirmed case(s): Quarantine
May 15, 2015 A Notice of Quarantine was issued on 5/15/15 for all livestock on a Grant County premises with one (1) horse demonstrating VS-compatible lesions. The horse on the premises was examined by a private practitioner after the owner observed lesions on the lips of the horse; oral examination revealed other lesions compatible with Vesicular Stomatitis. No other livestock on the premises are demonstrating clinical signs of disease at this time. The affected horse is isolated from other livestock and enhanced biosecurity and insect control mitigation measures are implemented.
May 15, 2015 Equine Herpes Viruses Indiana, IN Ongoing Investigation
May 15, 2015-At this time, Indiana has no positive cases of EHM or EHV-1 that we are investigating and no quarantines in place. We are monitoring the situation and asking horse owners who travel to shows both in Indiana and other states to use good biosecurity practices to keep all diseases from spreading to our equine athletes. We have advised show organizers and show facilities to also use good biosecurity when conducting their events. Please call the BOAH office at 317-544-2400 to report any disease or if you have further questions.