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A 59-year-old man was admitted for fever of unknown origin. Fever was associated with chills. His medical record revealed the history of aortic valve replacement 11 years earlier, as well as enterococcal endocarditis 4 months prior to the current admission. The patient was found to have normal left ventricular size with borderline systolic function, left ventricular hypertrophy, right ventricle at the upper limit of normal size, mild systolic dysfunction and mild transvalvular aortic insufficiency on transthoracic echocardiography; while no vegetations were observed on transesophageal echocardiography. Sequential blood cultures were negative; however, a blood culture sample obtained 5 …