Ear infections (Otitis ) in dogs| Causes, Clinical signs (symptoms), Diagnosis, Treatment, Prognosis

Otitis is one of the most common causes of consultations in veterinary practice. It is an inflammation of the ear canal and can present as erythematous otitis when there is an inflammation of the ear canal without secretion; as erythemato-ceruminous otitis when there’s inflammation of the ear canal and presence of an abundant ceruminous exudate; as suppurative otitis when there are erosions in the ear canal and pus; and as stenotic otitis when there are hyperplastic changes of the ear canal.
An otitis can be divided in otitis externa, otitis media and otitis interna. An otitis externa affects the external auditory canal, from the pinna to the tympanic membrane or ear drum; and it is the most common form of otitis and what we will focus on today. We can also have an otitis media when there is inflammation within the middle ear, often secondary to an otitis externa. At last, an otitis interna is an inflammation of the inner ear, usually resulting from an extension of an otitis media.

In this lesson we will discuss the Diagnosis, Treatment and Prognosis of dogs with this disease.

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Bibliography: Ettinger, S. J., Feldman, E. C., & Cote, E. (Eds.). (2017). Textbook of veterinary internal medicine (8th ed.). St. Louis, Missouri, US: Elsevier.