MSFinals-2637

A 78-year-old male presents to the emergency department with severe pain in his left thigh. He has a history of recurrent UTIs and currently has a catheter in place. Upon examination, he is febrile and experiences significant tenderness in the left thigh, making it difficult to move his knee. Blood and bone cultures both come back positive, leading to a diagnosis of osteomyelitis. What organism is most likely responsible for this infection?