Quarantines continue in Pennsylvania and New York, while quarantines have been imposed in Maryland due to the Equine Herpes Virus. 

As of Jan. 23, the University of Pennsylvania’s large animal hospital, New Bolton Center in Kennett Square, Pa., is still under a self-imposed equine quarantine for Equine Herpes Myeloencephalitis (EHM). New Bolton Center has canceled all elective, equine appointments pending further instructions from the regional state veterinarian.

According to the Equine Disease Communications Center:

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Since the quarantine was imposed, eight trace-forward premises (equine locations where horses that may have been exposed at New Bolton returned to before the EHM case was confirmed) and one trace-back premise have been placed under quarantine.

The horse that triggered the quarantine had come from Maryland.

Two barns at New Bolton Center are currently under quarantine; the remainder of the facility is not under formal quarantine following a thorough risk assessment. At New Bolton and the other quarantined premises in Pennsylvania, monitoring of horses with testing is being implemented in addition to bio-security precautions.

One horse previously housed in barn 20 at Laurel Park Racetrack in Maryland tested positive on nasal swab for EHV-1 wild type. The horse had been discharged from New Bolton Center in Kennett Square, Pa. prior to the quarantine being put in place there.

The Laurel Park horse tested negative for EHV-1 on whole blood and is clinically normal, but was removed from barn 20 and placed in strict isolation off the premises. Barn 20 is under an Investigational Hold Order until further notice.

The horse was to be retested on Jan. 22 to determine how long Barn 20 will be kept under the hold. As of Jan. 23 no other horses at five Maryland premises that were potentially exposed, have shown any symptoms of disease.  They are being monitored with twice daily body temperatures and enhanced bio-security. For precautionary measures, shipping restrictions and racing other than Barn 20 is being determined by the various race track officials. 

Meanwhile in New York, the New York Racing Association announced that the precautionary quarantine of Barn 44 at Belmont Park for Equine Herpesvirus-1 remains in place after a follow-up test has come back positive after an initial test done earlier.

The affected horse, an unnamed, unraced 3-year-old male, had first tested positive for EHV-1 on Jan. 9, after being sent to the Cornell Ruffian Equine Hospital near Belmont to be treated for a fever and mild respiratory issue.

Since his release from the Ruffian Center, the horse has been quarantined in isolation at Belmont. Throughout this process, the horse, trained by Linda Rice, has shown no neurological symptoms of the virus. 

All horses in Barn 44 have been and will continue to be monitored daily for fever and other signs of illness. Currently, all horses that had been exposed to the affected horse have not had fevers or symptoms of the disease.

Congruent to the procedures presently in place, these horses will not be permitted to run or enter races through the duration of the quarantine. They will continue to train in isolation during special training hours following the normal closure of the Belmont training track.

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