PathogenWhite blood cells per μL (× 109 per L)Percentage of neutrophilsGlucose levelProtein level in mg per dL (g per L)Likelihood of observing organism on CSF stain
Pyogenic (not Listeria monocytogenes)> 500 (0.50)> 80Low> 100 (1.00)~70%
L. monocytogenes> 100 (0.10)~50Normal> 50 (0.50)~30%
Partially treated pyogenic> 100~50Normal> 70 (0.70)~60%
Aseptic, often viral10 to 1,000 (0.01 to 1.00)Early: > 50
Late: < 20
Normal< 200 (2.00)Not applicable
Tubercular50 to 500 (0.05 to 0.50)< 30Low> 100Rare
Fungal50 to 500< 30LowVariesOften high in cryptococcus