Otolaryngology on Line: Malignant Otitis Externa - Dr. T. Balasubramanian M.S. D.L.O. provides information on this condition usually caused by the Psuedomonas organism, its epidemiology, pathophysiology, clinical features and spread. Seattle Children's Hospital: Swimmer's Ear - Provides information on this infection of the skin that lines the ear canal. Offers advice on treating the condition at home and on when to call the doctor. Otolaryngology on Line: Otitis Externa - Provides a definition of this condition, its classification, symptoms and management. Medinfo: Outer Ear Infection - Symptoms, causes, diagnosis and treatment. Massachusetts Eye and Ear Infirmary: Swimmer's Ear - Information on how to avoid this common problem, medically known as external otitis. Wikipedia: Otitis Externa - Article on this condition, its types, symptoms, causes, diagnosis, treatment, prognosis and complications. eMedicine: Otitis Externa - Provides an overview of this condition, its pathophysiology, clinical signs, causes, diagnosis and treatment. eMedicine Health - Swimmer's Ear - Learn about the causes, symptoms, and treatment of this condition. NHS Choices: Otitis Externa - Provides details of symptoms, causes, diagnosis, treatment, complications and prevention.