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Category: Equine Health

MDA’s Official Report on Montgomery County EHV1 Case

From the Maryland Department of Agriculture ANNAPOLIS, MD (Sept. 24, 2018) – On September 21, the Maryland Department of Agriculture’s Animal Health program confirmed a positive test for Equine Herpesvirus Myeloencephalopathy (EHM) in a 12-year-old warmblood gelding stabled at a private farm in Montgomery County. The neurological horse was seen earlier that day at a private veterinary clinic in Loudoun County, Virginia, and was treated as an outpatient before returning home. The Montgomery County farm has been placed on an investigatory hold effective September 21. There are 18 horses on the farm in three barns. The positive gelding is isolated from all horses on the farm. The positive gelding was previously housed with four horses in one barn. The other two barns are more than 30 feet away from the exposed barn. Strict isolation and biosecurity protocols are in place at the exposed barn with body temperatures taken twice daily. There will be no movement on or off the farm. The attending veterinarians administered to this farm will be notified of the hold order and apprised of the procedures taken to control the spread of EHV-1/EHM. Possible links to the positive gelding are actively being investigated. Owners are cautioned to monitor horses at their premises carefully, and should contact their private veterinarians to arrange for Equine Herpesvirus testing if a horse exhibits significant temperature elevations or neurologic signs. Veterinarians are required...

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EHV-1 Confirmed in Montgomery County

The Maryland Department of Agriculture placed a hold order on private farm in Montgomery County where one horse tested positive for Equine Herpesvirus (EHV-1) on Friday, September 21. The gelding was being treated as an outpatient at Spurlock Equine Associates in Virginia before returning to its Maryland home that day. The gelding has since been isolated from all horses on the farm and is undergoing treatment. Dr. Michael Radebaugh of MDA told The Equiery this morning that out of the 18 horses that are stabled at the Montgomery County farm, only the one horse has tested positive. There are three barns on the property and the other four horses that were exposed to the positive horse are quarantined in their own barn with temperatures being taken and logged with MDA twice a day. “The other horses on the property are in barns that are more than 30 feet away,” Dr. Radebaugh stated. “They too can not leave the property and no new horses can come onto the property either.” In accordance with EHV-1 protocols set at the national level, the hold order will last 21 days after the last horse has tested positive. Dr. Radebaugh and his team have already started notifying other barns where the positive horse had recently traveled. “He had been stabled at another farm in Virginia recently and that farm owner has placed her facility...

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EIA Quarantine Lifted

According to Maryland State Veterinarian Dr. Michael Radebaugh, the quarantine of the Montgomery County Farm due to a case of Equine Infectious Anemia has been lifted as of Friday, September 14. “No other horses on the property have tested positive for EIA since the 60-day hold order was first put in place, so it is now business as usual,” Dr. Radebaugh stated. He added that 271 horses have been tested in Maryland and Virginia during the investigation and no other horses have tested positive for EIA. “We still have some loose ends to tie up and a few more horses to test but everything is fine,” he said. One horse at the Montgomery County Farm tested positive for EIA on July 9, which was the start of the mandatory hold order. To read the full story of this case, click here: http://equiery.com/montgomery-co-horse-tests-positive-for-equine-infectious-anemia/...

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Diagnostic Imaging – Which One Is Best? – Marion DuPont Scott Equine Medical Center

Diagnostic imaging techniques for determining lameness in horses is constantly evolving and improving, assisting veterinarians to provide accurate diagnosis, prognosis and appropriate treatment options. Understanding imaging options will allow you to understand why your veterinarian has suggested one over another. Digital radiography(X-ray) provides clear, detailed images of bony structures of the horse and is used to diagnose fractures, bone cysts, and arthritis. However, radiographs create a two-dimensional image of three-dimensional bones, and thus can miss subtle abnormalities, especially in complex joints. Ultrasonography sends sound waves by a hand-held probe into the horse’s body. Structures with different densities reflect sound waves back to the probe, which in turn creates digital images. These high quality images are useful to monitor and diagnose soft tissue, joint and bone injuries; however, this technique cannot penetrate through bone, and only the surface of bone is visible. Nuclear Scintigraphy (Bone Scan) involves injecting the horse with radioisotope that tracks to actively changing bone and highlights bony injuries or changes. Using a gamma camera to scan the body, injured bone and tissue absorbs more radioisotope than healthy bone and tissue. This technique is useful for multiple limb lameness, inconsistent lame- ness, lameness detected at speed, kissing spine, neck arthritis and sacroiliac joints. But, it is a screening tool that often identifies a region to further investigate with additional imaging techniques to determine a specific diagnosis. ComputedTomography(CT) provides...

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Maryland Labs – First in Nation to Receive International Accreditation

The Maryland Department of Agriculture’s Animal Health Diagnostic Laboratories, located in Salisbury and Frederick, have become the first two animal health labs in the country to receive the updated International Organization for Standardization (ISO)/International Electrotechnical Commission (IEC) 17025:201 standard, accredited by the American Association for Laboratory Accreditation (A2LA). The Salisbury lab, which focuses primarily on poultry diseases, was the first to receive the accreditation on July 13, while the Frederick lab, which focuses on horses and food-producing livestock, was the second to receive the accreditation on July 19. According to MDA, the ISO/IEC 17025-2017 standard serves as an international reference for laboratories carrying out calibration and testing activities around the world. Being in compliance with this standard assures that Maryland’s animal health laboratories are implementing a sound quality system, are technically competent and are able to produce valid and reliable results. Earning this accreditation also allows Maryland to be able to work with and share reporting with other countries. This sharing of data will allow for smoother international trade. “Every day the staff from the Salisbury and Frederick Animal Health Labs are providing timely and accurate diagnostic services for Maryland’s equine, livestock and poultry industries,” said Maryland Department of Agriculture’s State Veterinarian Dr. Michael Radebaugh. “Achieving accreditation for this high international standard was no small feat as it took an enormous amount of time and effort. I am very...

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Potomac Horse Fever Detected in Maryland

From the Maryland Department of Agriculture – The Maryland Department of Agriculture received confirmation of a case of Potomac Horse Fever in a pony stabled in Frederick County from the University of Kentucky’s Equine Diagnostic Laboratory on August 2. The pony fell ill on July 26 and did not respond to treatment. The gelding died on July 30. A necropsy of the pony was performed at the Frederick Animal Health Laboratory on July 31. The Maryland Department of Agriculture is urging horse owners — especially those with horses that graze near rivers, streams and creeks — to watch their horses closely for signs of this disease. Clinical signs include mild to severe fever, diarrhea, dehydration, loss of appetite, laminitis and mild colic. Potomac Horse Fever is most commonly contracted by horses that ingest infected aquatic insects such as caddisflies, mayflies and dragonflies. “Potomac Horse Fever surfaces in Maryland every few years,” said Maryland Department of Agriculture’s State Veterinarian Dr. Michael Radebaugh. “With this summer’s heavy rains, pastures and meadows where equines graze are more likely to flood, increasing the chances that a horse could ingest these infected aquatic insects.” Equine owners are encouraged to keep horses off of flooded pastures, and to turn stable and barn lights off at night since the aquatic insects that carry this disease are attracted to bright light. Potomac Horse Fever has a mortality...

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