I live in Ohio and in our neck of
the woods EMP is a little more of a concern. I'm NOT a vet, but I've
helped care for several horses in our area with EPM and just thought I'd share
what I've been told.
Most horses have been exposed to EPM
so when doing a blood test the results will be positive for most
horses. EPM becomes a problem in horses who have a weakened immune
system and can't fight off the protozoa.
It's a progressive illness that
starts at the front of the horse and works it's way back. Stiff neck,
balance issues on the front end are first signs. As it progresses it
eventually works back to the hind quarters and the whole horse gets
involved. Because it is progressive the best chances for a full
recovery involve treatment as soon as the horse is diagnosed. The longer
you wait the more risk of permanent damage to the nerves in the spine.
Horses are effected to varying degrees. Some horses have died and/or had
to be put down while many others have had full recoveries.
Many of the horses in our area are
treated for EMP if they are suspected of having the disease. I think most
people feel the cost and timeliness of the treatment out weight the expense of
further tests and diagnostic expenses. I've worked with two horses who
have had to go through the treatment regime twice. One in six months and
the other two years later. Both horses are currently and successfully
competing in eventing.