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EHV-1: Confirmations in more US states, Canada

May 19, 2011


Cases of the neurological form of EHV-1 have been reported by more states, including New Mexico, Idaho, Utah, and British Columbia in Canada.

Idaho State Veterinarian Dr Bill Barton

Death toll

As at 25.6.2011

New Mexico
About EHV

The office of the New Mexico state veterinarian reported two suspected cases, one in the Albuquerque area and one in the Hobbs area.

All known horses that attended the cutting horse event in Ogden, Utah, from which the outbreak is believed to have spread, are under voluntary quarantine.

"At this time, we have not identified the location of all potentially exposed horses as reports are still being received," the office said.

In Idaho, the state's agriculture department said two Idaho horses which travelled to the event had died and several others are currently under the care of veterinarians.

State Veterinarian Dr Bill Barton recommended horse owners incorporate strict movement controls or containment methods to prevent the spread of the disease.

"If you participated in this event, or have contact with horses that travelled to this event, you should notify your veterinarian and isolate and monitor these horses for a minimum of 21 days for clinical signs of the disease," he said.

Utah state veterinarian Bruce King said this evening that laboratory tests had confirmed five cases at one facility in the state.

Utah has not changed its importation requirements for horses, mules, and/or burros entering the state at this time.

The Texas Animal Health Commission says it does not currently have any confirmed cases of EHV-1. However, the National Cutting Horse Association said one horse had reportedly tested positive in Weatherford, Texas.

The horse had been at the Ogden event and had been quarantined since its arrival in Weatherford. It was thought to be at low risk of shedding the virus before its isolation.

The first confirmed case in Canada was in southern Alberta, but authorities have since confirmed three further cases, in British Columbia.

The cases have been linked to the Ogden, Utah, cutting horse event.

The Canadian Food Inspection Agency says EHV is a disease present in Canada and is not a federally controlled disease.

Subsequently, it has no authority for requesting certification related to the disease from the United States Department of Agriculture when importing horses from the United States.

"Import conditions for all horses entering Canada from the US will not be changed in relation to the recent reports of EHV cases in the US," the agency said.

However, as always, imported horses need to comply with all current Canadian import conditions. In addition, arrival of unwell horses at the border can affect the import process.



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