CSF microscopy and culture
Chemistry: protein: 0.2 g/L (0.1-0.3), Glucose: 3.3 mmol/L (2.5-5.0), Lactate: 1.1 mmol/L (0-3.0)
Cell count: polymorphs: 0 x 10^6/L, Lymphocytes: 0 x 10^6/L, Total WCC: 0 x 10^6/L, RBC: 0 x 10^6/L
Gram stain: no organisms seen
Culture: no growth