If the ear drum is not present then ototoxicity is a bigger problem with topical therapies and very few are safe to use in a ruptured eardrum. It is important to know whether an ear drum is intact because the treatment options will be different depending on if the ear drum is present. In addition, an otoscopic examination is required to help to determine whether an ear drum is intact. Otoscopic examination is useful for determining whether polyps, foreign bodies, tumors, parasites (ie ear mites or ticks) or ear canal obstructions are present. Parasites are easy to find and identify on cytological preparations. Keratin and glandular secretions and no inflammatory cells suggest an endocrine or seborrheic disease. The only two options for the presence of yeast on cytology are : Malassezia spp. Inflammatory cells with rods often indicate one or more of the following bacteria: Pseudomonas spp., Proteus spp., Klebsiella spp. Inflammatory cells with cocci most often indicate Staphylococcus spp. This diagnostic test takes little time to perform and the amount of information gained is invaluable. One or more of these diagnostic tests may be necessary.Įar swab cytologies should be performed on every ear case. More advanced cases will require bacterial cultures, video otoscopic examination, imaging (bulla series radiographs, CT, MRI), biopsies, and myringotomy. All cases, even first time cases, should have a cytology and an otoscopic examination (standard handheld otoscope or video otoscope) as part of the work-up. The diagnostic tests that are selected for each patient will vary depending on the chronicity and severity of the ear disease. We will discuss all of the diagnostic and many of the treatment options for otitis. It is important that the veterinarian know all of the options that are available so that they can make recommendations to the pet owner. Several different diagnostic and medical treatment options exist for treating otitis in dogs and cats.
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