Prosthetic Knee Joint Infection by Brucella melitensis.

Prosthetic joint infection following arthroplasty is a serious complication associated with high morbidity and prolonged hospitalization. Treatment consists of a combination of surgical intervention and long-acting antibiotic therapy targeted to the responsible microorganism(s). Brucella species-related prosthetic joint infections are uncommon. Diagnosis can be challenging, especially in non-endemic countries, and is confirmed by serological studies and joint aspiration results. We present a rare case of a 78-year-old man with Brucella melitensis infection in a prosthetic right knee joint, seven years after the primary procedure. The patient was treated with a two-stage surgical intervention and a four-month period of antibiotic therapy. After a follow-up period of 12 months, no clinical or laboratory findings of infection were present and the patient was able to return to his everyday activities.