If a Patient with a Bacteremia Is Receiving Appropriate Antimicrobial

If a patient with a bacteremia is receiving appropriate antimicrobial therapy for a known infection but is not responding to treatment, how does the physician find out if another organism is causing the problem?

A) Redraw the blood cultures.
B) Redraw the blood cultures using an antimicrobial removal device.
C) Switch the patient to another agent that will resolve the clinical symptoms.
D) Perform hemodialysis to remove the organisms from the patient's blood.