Treatment of Otitis Externa in Cats With Ozonated Oil

The tubular portion of the outer ear that carries sound to the eardrum is called the ear canal. The most common disorder of the ear canal in cats is called otitis externa. This condition occurs when the layer of cells that line the external ear canal becomes inflamed. The inflammation may also extend to the ear flap (pinna). Signs include head shaking, odor, redness of the skin, swelling, scratching of the ears, increased discharge, and scaly skin. The ear canal may be painful or itchy depending on the cause or duration of the condition. One or both ears can be affected, and signs can occur suddenly or last a long time.
Otitis externa can be caused by many different factors. Some of these factors (such as parasites, foreign objects, and allergies) appear to directly cause the inflammation, while others (such as certain bacteria, yeasts, or a middle ear infection) worsen and perpetuate the condition. Identifying these factors is key to successful control of the inflammation. Unless all the causes are identified and treated, the condition may return.


A detailed history and thorough physical and skin examination can provide clues about the cause of otitis externa. The pinnae and regions near the ear may show evidence of self-trauma (from scratching, for example), redness of skin, and skin abnormalities. Deformities of the ears, an abnormal growth of tissue in the ear canal, and head-shaking suggest longterm ear discomfort.

Your cat may require sedation or anesthesia to allow a thorough examination using an otoscope. This is especially true if the ear is painful, if the canal is obstructed with discharge or widespread inflammatory tissue, or if your cat is uncooperative. An examination using an otoscope will allow identification of foreign objects or polyps deep in the ear, impacted debris, infections with parasites, and ruptured or abnormal eardrums. Often, veterinarians will take samples from the ear using a cotton-tipped applicator. Microscopic examination of the samples can quickly determine whether an infection or parasites (for example, ear mites) are present. Additional samples may also be taken for a laboratory culture (to specifically identify any bacteria or yeast causing an infection). Your veterinarian may also examine hair samples under the microscope to look for ringworm (a contagious fungal infection).

Additional tests are sometimes needed to identify the factors causing the inflammation. Allergy testing may be recommended. Cats with long-term, obstructive inflammation in only one ear may need a biopsy to look for the presence of a tumor. X-rays, computed tomography (CT scan), or magnetic resonance imaging (MRI) may also be needed if your veterinarian suspects that the inner or middle ear is also affected.

Ozone therapy has been around for hundreds of years. The goal of ozone therapy for your cat is to offer high doses of soluble oxygen to the body, which allows for increased healing of the body.

The American Academy of Ozonotherapy holds a wealth of information and research based evidence on this amazing modality.


Ozone therapy functions by several methods including:

  1. Decreasing inflammation in the body – this includes the high level of inflammation.
  2. Activating the immune system – including stimulating good cytokine production as well as the production of white blood cells
  3. Acting as a potent Antimicrobial — Eliminating viruses, bacteria, yeast, and other bad microorganisms via disinfection and more
  4. Improving circulation and increases antioxidant protection for cat

The activities of ozonated oil have been compared to those of Fluconazole, a drug commonly used to combat blastomycosis, histoplasmosis and various other fungal infections. It is also antibacterial and serves as an excellent vulnerary agent, bringing soothing relief and accelerating cell reproduction and granuloma at the site of open sores, insect bites and other minor injuries.

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