ABIM IM Practice Test 14
10 free ABIM IM practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Question 1 of 10
Infectious DiseaseA 42-year-old man is evaluated in the emergency department for 3 days of fever, chills, headache and myalgia. He returned 10 days ago from a 3-week trip to visit relatives in rural Ghana, where he grew up; he did not take malaria chemoprophylaxis because he had malaria several times as a child, and he recalls many mosquito bites. A rapid malaria antigen test at an urgent care clinic yesterday was negative, and he was told he probably has a viral illness. He has no rash, cough, diarrhea or urinary symptoms and no freshwater exposure. Temperature is 39.6 °C (103.3 °F), blood pressure is 116/70 mm Hg, pulse rate is 112/min, and respiration rate is 20/min. He is alert and oriented. There is mild scleral icterus and splenomegaly; there is no meningismus. Laboratory results are shown. Which of the following is the most appropriate diagnostic test?
| Test | Result | Reference range |
|---|---|---|
| Blood | ||
| Hemoglobin | 12.1 g/dL (L) | Male: 14–18 g/dL |
| Leukocyte count | 5200/µL | 4000–11,000/µL |
| Platelet count | 62,000/µL (L) | 150,000–450,000/µL |
| Serum | ||
| Bilirubin, total | 2.4 mg/dL (H) | 0.3–1.0 mg/dL |
| Alanine aminotransferase | 58 U/L (H) | 10–40 U/L |
| Creatinine | 1.1 mg/dL | Male: 0.70–1.30 mg/dL |
| Glucose | 88 mg/dL | 70–99 mg/dL (fasting) |
| Lactate dehydrogenase | 412 U/L (H) | 80–225 U/L |