MSFinals-3183

MSFinals-3183

A 55-year-old male patient is admitted with a seizure and reduced conscious level. He had been generally unwell with a fever and headaches over the previous 48 h. Computed tomography (CT) brain scan was normal. Lumbar puncture reveals: protein 0.8 g/l, glucose 3.5 mmol/l (serum glucose 5 mmol/l), WCC (white cell count) 80/mm3, 90% lymphocytes.
Which of the following is the most likely diagnosis?