You are asked to review a 73 year old lady who is in hospital for treatment of septic arthritis affecting a prosthetic right hip joint inserted 5 years earlier. The joint has been washed out and debrided twice, and she is receiving IV flucloxacillin and meropenem following culture of a methicillin-sensitive Staphylococcus aureus. She is on regular paracetamol for pain. Unfortunately, she has continued to deteriorate…