How Is EPM In Horses Contracted?

By Marcie Goodman


EPM in horses is a disease that attacks the neurological system. It is caused by tiny parasites which can be found in opossums. The exposure occurs if the equine drink water or eat feed which may have been contaminated by the feces of opossums.

The symptoms related to this disease vary greatly. It is dependent on the part of the nervous system that has suffered the attack. The protozoa that are present could leave the equine with spinal cord or brain stem lesions. This disease occurs most often during the summer and fall months of the year, however the fall appears to be the worst time for infection. The symptoms of the disease develop slowly and could be present in the horse for a few days after the initial infection.

It is quite difficult to diagnose EPM in horses as the symptoms are similar to several other neurological diseases. The symptoms vary from one horse to another and may include muscle atrophy and weakness. The animal may have difficulty in swallowing. The horse may experience a sore back, weakness and lack of co-ordination.

If the equine has a mild form of the disease, it may suffer from slight lameness and mild stumbling. If this is not treated in time, the horse will eventually be unable to stand up or swallow. In severe cases such as these, the horse is at risk of death. The equine may indicate drooping eyelids and a tilted head. The disease can affect horses of any sex, breed or age. The risk is much higher in younger horses and those that are frequently transported.

Prevention of the disease is possible in stables that do not attract opossums as they are the carriers of the disease-causing organism. Opossums are not selective about their eating fancy. They eat virtually anything, including dead animals, horse feed, dog and cat food.

To prevent these animals from invading your property, you should make sure that all food stores are secured. If there are dead animal carcasses on your property, you should make sure that these are buried as soon after death as possible. Food that has been spilled should be cleaned up immediately. If your property is at risk of opossums and you suspect that they are around, you should attempt to trap them in a humane way and remove them accordingly. You can choose to fence your property with specially designed fencing to keep opossums out. This is a good option if they have become a nuisance to your other animals.

This is a dangerous disease and horses that show signs of it should be examined by a veterinary specialist as soon as possible. A quick diagnosis and proper veterinary care will allow the horse to recover from the disease. The infection may leave the animal with permanent damage. The vet will normally examine the movement and gait of the equine. It is vital that spinal fluid and blood tests are undertaken to rule out diseases such as viral encephalitis and West Nile virus.

The treatment process for EPM in horses may include a variety of drugs which the veterinary surgeon will administer. The length of the treatment process could be long and expensive. The downside of the lengthy treatment process is that it is not guaranteed to be a success.




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