Q. A 32-year-old male patient presents to the medical outpatient department with a 3-month history of recurrent diarrhea mixed with blood, lower abdominal pain, and unintentional weight loss of about 5 kilograms. He also mentions feeling fatigued and having a low-grade fever for the past few weeks. There is no significant past medical history, and he takes no medications. His physical examination reveals pallor and mild lower abdominal tenderness but no signs of peritonitis. His blood pressure is 110/72 mmHg, temperature is 99 F, pulse is 67 beats per minute, and respiratory rate is 18 breaths per minute. His initial labs show a hemoglobin of 11 g/dL, a WBC count of 11.3 x 10^3/uL, and a platelet count of 455 x 10^3/uL. ESR is elevated at 50 mm/hr, and CRP is 30 mg/L. His liver function tests, renal profile, and electrolytes are within normal limits. Stool tests for ova and parasites are negative. What would be the most appropriate next step in management?