Problem
40 year old male from Quezon City presents at the emergency room with a 5 day history of fever associated with myalgia, headache, tea-colored urine, and decreased oral intake. No history of cough, dysuria, vomiting, dyspnea, and diarrhea. Vital signs showed BP of 110/70 mmHg, tachycardia at 110, RR 21, temp of 38.2. Other physical examination revealed icteric sclerae, pink palpebral conjunctivae, dry oral lips and mucosa, unremarkable abdominal findings, and calf tenderness on palpation. The rest of the PE is unremarkable.
A. What other information will you ask from the patient?
B. At this stage, what differential diagnosis will you consider?
C. What diagnostic tests will you request to determine the etiology of the fever?