Parasite count was measured twice a day. Arterial blood gas analysis before the institution of mechanical ventilation revealed severe hypoxaemia. Cerebrospinalfluid(CSF)examinationshowedalightyellowishcolour, white cell count 3/mm3, albumin 75 mg/dl, CSF sugar/bloodsugar50/60 mg/dland CSFlactate/bloodlactate 30/40 mg/dl.