Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
Otitis is defined as an inflammation of the ear. There are three recognized types o otitis corresponding to inflammation in the various parts of the ear. otitis externa is an inflammatory disease of the external ear canal.
Hedlund, Cheryl and DeYoung, D.
"Otitis Externa and Surgery,"
Iowa State University Veterinarian: Vol. 39
, Article 5.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol39/iss1/5