Ear Infections

Infection of the outer ear is very common in dogs. A dog with an ear infection is uncomfortable; it shakes its head trying to get the debris out, and scratches its ears. The ears often become red and inflamed and develop a bad odor. A black or yellowish discharge commonly occurs. There are several kinds of bacteria and at least one type of fungus that might cause an ear infection. Without knowing the kind of infection present, we do not know which drug to use. The dog must also be examined to be sure that the eardrum is intact. First, the ear canal is examined with an otoscope, an instrument that provides magnification and light. This permits a good view of the ear canal. This examination allows us to determine whether the eardrum is intact and if there is any foreign material in the canal. The next step is to examine a sample of the material from the ear canal to determine which organism is causing the infection. This is called cytology. Examination of that material under the microscope is very important in helping the veterinarian choose the right medication to treat the ear canal. Sometimes, it reveals the presence of more than one type of infection; this situation usually requires the use of multiple medications or a broad-spectrum medication. Then a deep ear cleaning, many times with anesthesia, is needed.

An important part of the evaluation of the patient is the identification of underlying cause of the disease. Many dogs with recurrent ear infections have allergy problems or low thyroid function. If underlying disease is found, it must be diagnosed and treated, if at all possible. If this cannot be done, the dog is less likely to have a favorable response to treatment. Also, the dog might respond temporarily, but the infection will relapse at a later time (usually when ear medication is discontinued). If you notice your dog showing signs of ear infection, call and schedule an appointment. Not only will timely treatment ease your pet’s discomfort but serious and costly complications may be avoided as well.
We at Hillsboro Veterinary Clinic are here to help you and your pet. Please feel free to call at (503) 648-4117 to schedule an appointment today.