How Is EPM In Horses Contracted?

By Marcie Goodman


A disease called EPM in horses is caused by a tiny parasite which affects the neurological systems. The parasite responsible for this is found in opossums. Horses generally come into contact with the parasite if their feed or water has been contaminated by opossum feces.

The symptoms of the disease vary. This is dependent upon the point of attack in the nervous system. The protozoa may leave the horse with lesions on its brain stem and spinal cord. The disease is most common during the fall and summer months, however fall seems to be the worst time. Symptoms are fairly slow in developing and may be present several days after 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.

Since opossums carry the disease-causing organism, you should make the area as unattractive to them as possible to aid in preventing the disease. Opossums are known to not be very selective about what they eat. They will eat anything, from cat food to dead animals.

To avoid invasion from these animals, ensure that all food stores are secure. If there are animal carcasses on the property, ensure that they are buried as quickly as possible. Spilled feed should be cleaned up promptly and not left lying around. If you suspect that opossums are on your property, you should trap them in a humane manner and remove them. It is possible to obtain fencing that has been specially designed to keep them out. This is a good option to consider if opossums have become a nuisance on your property.

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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