A 33 y/o male comes to the ED for fever, knee swelling and pain. He has a history of joint surgery because of trauma, and prothesis, dating 4 years before. He is HIV positive He presents feverish (38°C), the left knee is swollen and hot. WBC 34.000/μL, CRP 109 mg/L, PCT 0,05 ng/mL. As we…
