<prompt> Which is a causative organism for malignant ot externaVirusBacteriaFungiProtozoa  <response>: Ans. b BacteriaRef: Dhingras ENT 5th ed. 157-58 Malignant otitis externa is caused by pseudomonas infection in elderly, diabetics patients on the immune- compromised drugs . Early manifestation resembles diffuse otitis externa. Patients have severe pain appearance of granulation in meatus.Infectious Etiology of Ear CanalBacterialFungalViral Localized otitis externa Diffuse otitis externa Malignant otitis externa Otomycosis Herpes zoster oticus Otitis externa hemorrhagica 