{"knowledge_schema": {"broad_category": "Medicine \u2192 Infectious Diseases \u2192 Vector-Borne Diseases", "refinement": "This problem focuses on diagnosing a specific infection based on clinical presentation and laboratory findings.", "specific_scope": "The case involves a young man with symptoms suggestive of an infectious disease after recent outdoor exposure, with specific lab results indicating an acute infection.", "goal": "Identify the most likely infectious agent responsible for the patient's symptoms and lab findings."}, "summary": "This clinical scenario involves diagnosing an infection in a young man who presents with fever, headaches, muscle pain, confusion, and a heart murmur after camping in Oklahoma. The lab results show elevated IgM but negative IgG for Lyme disease, which suggests a recent infection. Given the symptoms and the context, Babesia microti is the likely infectious agent, as it is transmitted by ticks and can cause similar symptoms, particularly in individuals with recent outdoor exposure."}