Cultures (are/are not) routinely required for the diagnosis of otitis externa.
USMLE® Step 1 style questions USMLE
USMLE® Step 2 style questions USMLE
A 65-year-old man presents to the emergency department with severe pain in his left ear that has been worsening over the past week and is accompanied by purulent drainage. The patient reports that his ear feels full and that he has decreased hearing in the left ear. His past medical history is significant for poorly controlled diabetes mellitus. His vitals are stable, with a mild fever of 38.4 C (101.1F). On physical examination, there is swelling and erythema of the left external auditory canal as well as purulent drainage and granulation tissue is at the floor of the osseocartilaginous junction.
Lab tests confirm that the patient has malignant otitis externa caused by an infection with Pseudomonas aeruginosa. Based on these results, which of the following antibiotics would most likely be used to treat the infection?