$800-$1000). Horses that recover can still encounter temporary or permanent deficits. It is estimated that up to 30% of horses treated may experience relapse, likely due to the lack of immune support during and post treatment.
More than 50 percent of all horses in the United States may have been exposed to the organism that causes EPM. The causative organism is a protozoal parasite called Sarcocystis neurona. The disease is not transmitted from horse to horse.
Learn to Recognize the Symptoms of EPM
- Ataxia (incoordination), spasticity (stiff, stilted movements), abnormal gait or lameness.
- Incoordination and weakness which worsens when going up or down slopes or when head is elevated.
Our results indicate that EPM can manifest as long as 90 days after the parasite has crossed the blood-brain barrier (data not shown), but in most of the challenged horses evidence of infection occurred within 30 days and ataxia was present by 60 days.
On Dec. 18, 2000, a vaccine to prevent EPM was approved by the USDA. As of Jan. 25, a total of 43 states had approved the use of the EPM vaccine under USDA conditional licensure.
Equine Protozoal Myeloencephalitis (EPM): The signs and treatment
- Ataxia (incoordination), spasticity (stiff, stilted movements), abnormal gait or lameness.
- Incoordination and weakness which worsens when going up or down slopes or when the head is elevated.
For horses with ataxia caused by articular process joint (facet joint) osteoarthritis, injecting steroids into the joint can improve the horse's condition for a period of time.
Paralysis of muscles of the eyes, face, or mouth, evident by drooping eyes, ears, or lips; Loss of sensation of the face; Difficulty swallowing; and. Head tilt with poor balance—the horse might assume a splay-footed stand or lean against stall walls for support.
Equine Protozoal Myeloencephalitis (EPM) is a neurologic disease in horses caused by infection with the protozoan Sarcocystis neurona (SN). SN infects horses when they ingest the organism in contaminated feed or water. The definitive host of this organism is the opossum, which passes the organism in its feces.
A hopping gait may be exhibited in severe cases. Technically considered an unsoundness, some affected horses successfully remain in work without impairment, although they may not be suited for certain disciplines like dressage. Stringhalt is not a reaction to pain, so affected horses are not necessarily uncomfortable.
Horses affected with classic stringhalt rarely recover and often become progressively worse with time. The disease usually affects one rear leg but some cases progress to involve both. Due to safety concerns, I would never advise my clients to ride a horse affected with stringhalt.
The cause of classic stringhalt is unknown. It is thought that classic stringhalt is the result of traumatic damage to sensory nerves to the extensor muscles of the rear limb. Other conditions may cause a horse to abruptly lift a rear limb and look like stringhalt.
Although stringhalt might look like strictly a muscular problem, neurologic issues are at the root of it. Nerve damage probably causes abnormal activity of certain sensory receptors called spindles, says Hahn. Located in the body of the muscles, spindles are responsible for detecting changes in muscle length.
Australian Stringhalt is associated with the ingestion of flatweed and dandelion. Other environmental factors or the growth of fungus on these particular weeds are suspected to be involved to cause the condition. Stringhalt often affects multiple horses in one region and often affects both hind limbs.
A locked stifle joint occurs when one of the ligaments remains hooked over a ridge on the head of the femur bone. Normally, the horse can flex the joint with little effort to unlock it.
Cause. True stringhalt and sporadic, or pasture-associated, stringhalt are most likely caused by underlying neuropathy. Stringhalt may be similar to peripheral neuropathies in dogs, in which long nerves such as the recurrent laryngeal and sciatic nerves can be preferentially involved, and the cause is often not known.
Triple Crown Safe Starch Forage, with a NSC level below 10%, this forage is recommended for Cushing's horses that should be removed from pasture or may not have a hay supply that is tested for starch and sugar content. Pasture grass can contain high NSC levels, so it should be avoided or provided minimally.
Left undiagnosed or untreated, Cushing's disease can wreak havoc quickly on a horse. In the advanced stages of the disease, severe neurological problems can occur if the pituitary gland becomes big enough and causes compression in the brain.
Unfortunately most commercially made horse treats, as well as apples and carrots, can be high in sugar. This presents a problem with horses that have Cushing's disease, or Insulin Resistance/Metabolic Syndrome, as those horses' sugar and starch intake must be limited.
Since the body releases insulin in response to elevated blood glucose levels, avoid feeds that are high in sugar and starch, measured by feed companies as water soluble carbohydrates (WSC), ethanol soluble carbohydrates (ESC), and starch.
"Cushings disease is dangerous and if not picked up in early stages can be fatal, not from the disease itself but from conditions such as laminitis or colic," says Australian dressage rider Brett Parbery who had to euthanize his most successful Grand Prix horse to date, Victory Salute, due to PPID.
One such health condition where horses are clipped is Cushing's, a disease that can cause a horse to not shed its winter coat properly. Clipping a horse suffering from Cushing's disease, even with a partial clip, allows a horse to regulate their body temperature more effectively in the summer and winter months.
Alfalfa can be a good option for a horse with Cushings if they are a hard time holding their weight because it is more calorie-dense than grass hay.
about five to seven years
