Unanswerable Questions in Infectious Diseases: Persistent MRSA Bacteremia

Dr. Paul Sax continues a series of posts on infectious diseases quandaries — questions that come up on the inpatient service for which there is no definitive answer. How would you respond to the following case? A patient with persistent MRSA bacteremia has improved somewhat since starting on vancomycin, but still has positive blood cultures and fevers. Would you change the antibiotics? Take the poll in the HIV and ID Observations blog.