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Skip Navigation LinksAll Horse Topics > Infectious Diseases > Equine Protozoal Myeloencephalitis (EPM)

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  • Vaccinating Horses With EPM |  8/24/2010
    What is your opinion on giving half-doses of routine vaccinations to horses with EPM? I've read that a half-dose of vaccine in an adult horse is worthless. My horse has already received half-doses of everything. What can I do to protect him?...  Read more
  • Equine Protozoal Myeloencephalitis (EPM): Debunking the Myths |  6/1/2009
    Equine protozoal myeloencephalitis (EPM) is a bit like a rock star: highly Googled, morbidly fascinating, yet oftentimes completely misunderstood. "The EPM story is truly a success story for modern veterinary research. Twenty-five years ago we became aware of an enigmatic parasitic...  Read more
  • Today's EPM |  4/1/2008
    What have we learned about equine protozoal myeloencephalitis (EPM) since it first was reported in 1995? A lot, and not enough. EPM has been called the "most overdiagnosed neurologic disease in the United States" by some researchers and veterinarians, yet we really don't know how many horses are affected each year by this disease. Estimates are that thousands show actual clinical signs that are...  Read more
  • Ever-Elusive EPM |  4/1/2008
    Charlie (not his real name) had been a patient at our clinic on several occasions. He was always gentle and cooperative as we tried to determine what was causing his curious collection of clinical signs. He had tolerated everything from the obvious poking and prodding to neck radiographs and endoscopic exams. His visits generally centered on his odd gait and some neck stiffness. He had been...  Read more
  • EPM Diagnosis |  4/1/2008
    Could EPM be causing your horse's performance to be just a little off? Equine protozoal myeloencephalitis (EPM) continues to be an elusive disease to prevent, diagnose, and treat in horses. In this special collection of three articles this month, we will delve into the often-contentious world of EPM research to share what practitioners and those studying the disease have discovered....  Read more
  • EPM Prevention |  4/1/2008
    How can you keep your horses safe from EPM? The best way to keep your horses healthy is prevent them from getting sick. Sounds absurdly simple, right? In theory, this works. But in the real world of trying to protect horses from diseases such as equine protozoal myeloencephalitis (EPM), it isn't always that simple. Sharon Witonsky, DVM, PhD, Dipl. ACVIM,...  Read more
  • EPM Treatment |  4/1/2008
    To understand the best approach to treating equine protozoal myeloencephalitis (EPM), it is helpful to have a brief look at how the protozoa (single-celled parasites) that cause EPM--Sarcocystis neurona--enter the central nervous system. David Granstrom, DVM, PhD, one of the pioneer researchers into EPM when he worked at the University of Kentucky's Gluck Equine Research Center,...  Read more
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