question: Q:A 65-year-old man presents with low-grade fever and malaise for the last 4 months. He also says he has lost 9 kg (20 lb) during this period and suffers from extreme fatigue. Past medical history is significant for a mitral valve replacement 5 years ago. His temperature is 38.1°C (100.6°F), respirations are 22/min, pulse is 102/min, and blood pressure is 138/78 mm Hg. On physical examination, there is a new onset 2/6 holosystolic murmur loudest in the apical area of the precordium. Which of the following organisms is the most likely cause of this patient’s condition?? 
  {'A': 'Candida albicans', 'B': 'Coagulase-negative Staphylococcus spp.', 'C': 'Pseudomonas aeruginosa', 'D': 'Enterococcus', 'E': 'Escherichia coli'},