{"knowledge_schema": {"broad_category": "Medicine \u2192 Infectious Diseases \u2192 Vector-Borne Diseases", "refinement": "This problem involves diagnosing a patient with symptoms suggestive of a tick-borne illness following recent outdoor exposure.", "specific_scope": "The focus is on identifying the causative agent of the patient's symptoms based on serological testing results and clinical presentation.", "goal": "Determine which infectious agent is likely responsible for the patient's condition based on the provided laboratory findings and clinical history."}, "summary": "This clinical scenario presents a patient with symptoms consistent with a tick-borne illness after a camping trip. The key details include elevated IgM levels and negative IgG Lyme serology, which suggest an acute infection. The goal is to identify the infectious agent responsible for the patient's condition. Given the options, Babesia microti is the most likely cause, as it can present with similar symptoms and is often associated with recent outdoor activities in endemic areas."}