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30-year-old woman presents with complaints of fever. She also complains of diarrhea and has been experiencing abdominal pain. She returned home a few weeks ago after a trip to India. On presentation, her temperature is 102 F (38.9 C), she has a pulse rate of 68 bpm, a blood pressure of 100/70 mmHg, and a respiratory rate of 20 breaths/min. On general physical examination, a maculopapular rash is noted on the abdomen. Further examination demonstrates splenomegaly, and mild abdominal tenderness is also observed. She has a hemoglobin level of 10 g/dl, a white blood cell count of 3500/mm3, and a platelet count of 245,000/mm3. Her renal function tests include urea levels of 16 mg/dl (normal 7 mg/dl to 20 mg/dl), and a creatinine of 0.8 mg/dl (normal 0.6 mg/dl to 1.2 mg/dl). Liver function tests show bilirubin of 0.5 mg/dl (normal 0.2 mg/dl to 1 mg/dL), alanine aminotransferase of 20 IU/L (normal 5 IU/L to 30 IU/L), aspartate aminotransferase of 24 IU/L (normal 6 IU/L to 34 IU/L), and an alkaline phosphatase level of 48 IU/L (normal 20 IU/L to 140 IU/L). A blood culture is appropriately sent. Which of the following antibiotics would be the most appropriate in the management of this patient?

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