Signs and Symptoms of Lyme Disease in Horses

Lyme disease is a serious concern for both pets and people, and it is important for horse owners to be on the lookout for signs of illness in their animals. Lyme disease often goes undetected in horses, since fewer than 10 percent of affected equines actually exhibit clinical signs. Watching your horse and knowing what is normal and abnormal behavior for him is one of the best ways to spot this illness early and get it treated promptly. Horse owners should get in the habit of checking both themselves and their horses for ticks after every ride. The ticks that carry Lyme disease are found virtually everywhere, so checking for these parasites is a good preventative practice.

  1. Lameness

    • Mysterious lameness that does not have an apparent cause is one of the most common symptoms of Lyme disease. Often the horse will appear to be stiff, with a stilted gait and an uncomfortable appearance. The type of lameness associated with Lyme disease generally affects the larger joints, like the knees and shoulders, rather than the foot. Horse owners can distinguish between the two by pressing on the horse's foot and looking for signs of discomfort.

      Another hallmark of the lameness that sometimes accompanies a Lyme disease infection is that the problem moves from limb to limb. It is very unusual for lameness caused by foot problems and hoof issues to shift from leg to leg, so if you notice this type of problem, call your veterinarian immediately.

    Behavioral Changes

    • Lyme disease can sometimes cause behavioral changes in the equine, so horse owners should be on the lookout for any sudden changes in attitude or willingness to work. It can be difficult for an outsider, even an experienced veterinarian, to spot behavioral changes--these issues are best spotted by the owner and others familiar with the animal. Lyme disease can cause a general irritability, as well as a general unwillingness to work. Owners who spot these kinds of problems and cannot attribute them to any outside cause should contact their vets for a diagnosis.

    Laminitis

    • Laminitis is different from the generalized stiffness and soreness that often points to Lyme disease. This symptom is somewhat rare, but it is still important for horse owners to be aware of it. Laminitis is an inflammation of the hoof wall, and it is quite painful for the horse. Affected horses often find it difficult to walk, or even stand, and the problem will be quite apparent even to those with no experience working with horses. Laminitis is always a cause for concern, no matter what the cause, and horse owners who notice this symptom should contact their veterinarians at once.