Question category: Neurology
A 22 year old patient is brought to A+E. She was complaining of a headache, malaise, fever and nausea and vomiting one day previously and then suddenly dropped her conscious level. She is dysphasic and has a right hemiparesis. She then develops a focal seizure. A CT shows abnormalities in temporal lobes, with hypodense areas being present. A lumbar puncture is performed and reveals a slightly high protein, normal glucose and raised mononuclear cell levels. What is the most likely diagnosis?