MSFinals-2301

A 65-year-old male who recently had cardiac surgery is experiencing symptoms of fever, fatigue, and weight loss. After being discharged following a successful mitral valve replacement 6 months ago, an urgent echocardiogram is conducted and reveals a new valvular lesion, leading to a diagnosis of endocarditis. To confirm the diagnosis, three sets of blood cultures are collected. What is the most probable organism responsible for the patient’s condition?