1. A 54-year-old m an was adm itted to the hospital w ith fever (100.6°F, 38.1°C), night sweats, arthralgias, and 15 lb (6.8 kg) of unintentional weight loss. Past history was signi cant for rheum...

1. A 54-year-old m an was adm itted to the hospital w ith fever (100.6°F, 38.1°C), night sweats, arthralgias, and 15 lb (6.8 kg) of unintentional weight loss. Past history was signi cant for rheum atic fever at the age of 9 and for dental surgery 1 m onth ago. The sym ptom s started about 2 weeks after the dental procedure. Physical exam ination was signi cant for m itral regurgitation, subungual splinter hem orrhages, and hem orrhagic plaques on the soles of both feet. Three blood cultures were ordered, and an em piric therapy was started. Which of the follow ing should be an appropriate treatm ent for the patient at this tim e? A. Am picillin and erythromycin B. Piperacillin and chloram phenicol C. Aztreonam and am ikacin D. Penicillin G and gentam icin E. Dicloxacillin and cipro oxacin