CSF Analysis



 
  Normal Bacterial Viral Fungal Tb Abscess
Color clear opalescent clear or opalescent clear or opalescent clear or opalescent  
WBC/mL 0–5 >1000* <1000 100–500 100–500 10–1000
%PMN 0–15 >80* <50 <50 <50 <50
%lymph >50 <50 >50 >80 monos variable
Glucose 45–80 <40 45–65 30–45 30–45 45–60
Ratio ≥ 0.6 ≤0.4 45–65 <0.4 <0.4 0.6
Protein 15–45 150–1000 50–100 100–500 100–500 >50
Pressure 6–20 20–50 variable >20 >20 variable

 

Labs to order

Normal

  1. Color: clear
  2. Pressure: 70-180 mm H2O
  3. Cells: 0-5 mononuclear
  4. Protein: 15-45 mg/dL [150-450 mg/L]
  5. Glucose: 45-80 mg/dL [3.0-4.4 mmol/L]

Bacterial Meningitis

  1. Color: opalescent
  2. Pressure: incr
  3. Cells: >5 to many PMNs
  4. Protein: 50-1,500 mg/dL [500-15,000 mg/L]
  5. Glucose: 0-45 mg/dL [0-2.5 mmol/L]

Viral Infection

  1. Color: clear or opalescent
  2. Pressure: normal or incr
  3. Cells: >5-2,000; mostly lymphs
  4. Protein: 20-200 mg/dL [200-2,000 mg/L]
  5. Glucose: normal

Tuberculous Meningitis

  1. Color: clear or opalescent
  2. Pressure: incr
  3. Cells: >5-500 lymphs
  4. Protein: 45-500 mg/dL [450-5,000 mg/L]
  5. Glucose: 10-45 mg/dL [0.55-2.5 mmol/L]

Fungal Meningitis

  1. Color: clear or opalescent
  2. Pressure: normal or incr
  3. Cells: >5-800 lymphs
  4. Protein: normal or incr
  5. Glucose: normal or decr

Carcinomatous Meningitis

  1. Color: clear or opalescent
  2. Pressure: normal or incr
  3. Cells: >5-1,000 mononuclear
  4. Protein: up to 500 mg/dL [5,000 mg/L]
  5. Glucose: normal or decr

Subarachnoid Hemorrhage

  1. Color: bloody or xanthochromic
  2. Pressure: normal or incr
  3. Cells: many RBCs
  4. Protein: up to 2,000 mg/dL [20,000 mg/L]
  5. Glucose: normal