Earlier this week, I was expecting a call from an equine dentist to confirm an appointment for Paco on Wednesday or Thursday. When I spoke to her, she said that she had recently been in California, and there had been an outbreak of a mutant form of Equine Herpesvirus (EHV-1) in Utah and California, among other states. She declined to come and work on Paco’s teeth because of the risk of contributing to the spread of the disease. At that time, she had no way of knowing whether she had come into contact with any infected horses or not, so it was best to err on the side of caution.
Apparently, an infected horse was at an American Cutting Horse Association’s Western National Championships in Ogden, Utah, which meant that a number of horses from a variety of states were exposed. Indeed, as of yesterday, California was reporting ten positive horses, Colorado, two; in Idaho, two horses which had been in Ogden have died and five others are under veterinary care.
Comprehensive information, as of May 18, 2011, can be found at Equine Chronicle Online; it includes information about travel restrictions, show cancellations, and a state-by-state status report. According to the May 19th Arizona Daily Star (Tucson), Pima County has suspended all equestrian activities and commercial stables have implemented specific restrictions to address the problem.
Vickie Pitts, owner of Pusch Ridge Stables, where Paco boards, in an interview with the Star said they are being cautious. They aren’t accepting any new boarders or overnight guests. They also aren’t moving their own horses to any events. “We don’t believe there’s any immediate threat, but these things travel so erratically – you just really need to use precautions,” Pitts said. She also emailed her boarders with the following restrictions:
Ok there are a lot of rumors on this “new” virus I have no good answers now EXCEPT I will not allow any farriers, chiropractors, friends with horses, or any other persons that might share this virus with us on our property until further notice. If you have a horse at another stable then you must change all of your clothing including footwear before you come here and you can not transfer tack items or anything else. PLEASE call me so we are all on the same page with this. You should not ride with any other horse and I strongly suggest you do not go out on the trails at all for the moment.
If we all pay attention and share information this should not be a problem at our stable.

One of the beautiful trails in the park which we will now have to avoid.
I’m pleased that Vickie is taking such a pro-active stance. The trail restriction is important because from PRS we have access to Catalina State Park and Coronado National Forest trails where we often meet other riders who may or may not be local. The park has an equestrian center where travelers can stop for any number of nights with their horses. As of now, there is no announcement on their website regarding closing the facility, so it’s entirely possible that horses from other states might be overnighting there.
In a May 16th article, the Equine Chronicle Online provides important information that every horse owner needs to know about this disease and the current outbreak. The Arizona Department of Agriculture has released a statement regarding the outbreak here, which includes the following information:
Equine Herpes Virus is highly contagious among horses but poses no threat to humans. The symptoms in horses may include a fever, nasal discharge, wobbly gait, hind-end weakness, dribbling of urine and diminished tail tone. The virus is easily spread by airborne transmission, horse-to-horse contact and by contact with nasal secretions on equipment, tack, feed and other surfaces. Caretakers can spread the virus to horses if their hands, clothing, shoes or vehicles are contaminated.
Other resources you might be interested in:
Frequently Asked Questions (from Colorado state veterinarian)
Equine Herpesvirus Fact Sheet (from American Association of Equine Practitioners)
So far, I have found the Equine Chronicle Online to be the best source of current information on this outbreak. We must pay attention and protect our horses from exposure to this deadly virus.