September 14, 2005
A 20-year-old woman, who had been confused and delirious for 2 days, was brought to the emergency department (ED). She had no significant past medical history and was taking no medication but had recently returned from a trip to Southeast Asia. In the ED, the patient had several convulsions and rapidly became comatose. She was unresponsive; her temperature was 37.9°C (100.3°F), and her blood pressure measured 80/50 mm Hg. The neurologic examination showed no signs of meningeal irritation. Cranial nerve examination was normal and showed mild, bilateral, symmetric increase in deep tendon reflexes. All other physical examination findings were normal.