Normal
TB Meningitis
Opening Pressure
5-20
Variable
Appearance
Normal
Fibrin web
Cell Differential
Normal
Lymphocytic (mononuclear) pleocytosis
WCC (per mm3)
<3
100-500
Protein (g/L)
0.2-0.4
1.0-5.0
High - very high
High - very high
Glucose-Serum Ratio
0.5-0.66
(2.5-3.5 mmol/L)
<0.4
Lactate
Normal
Very Low
Gram stain
Normal
6-10% positive
ZN Stain
ZN Stain
Microscopy & culture
-
60-70% positive
PCR
-
60-90% positive
Other
-