The causative agent for virulent external ear infection in a diabetic elderly is mostly by: (A) Staphylococcus, (B) Streptococcus, (C) Pseudomonas, (D) Hemophilus influenzae
Answer is C. Pseudomonas aeruginosa is the agent which is responsible for virulent external ear infection in diabetics, mainly Necrotizing otitis externa. (Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 55)