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Cerebrospinal Fluid (CSF) Protein by Bromocresol Green Turbidimetric Assay

Published: August 9, 2026Updated: August 16, 2026

This test measures the total protein levels in your cerebrospinal fluid, which is the fluid surrounding your brain and spinal cord. It helps assess conditions affecting the central nervous system.

Quick summary

["Protein levels in CSF can indicate inflammation, infection, or other neurological issues."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
109810-2
Short code
H capsul Ag Msmt CSF
Synonyms
H capsul Ag Msmt CSF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms like headaches, neck stiffness, confusion, or neurological problems. It can also be part of diagnosing conditions such as meningitis, multiple sclerosis, or other brain/spinal cord disorders.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your back to collect a small amount of CSF. You may feel a brief pinch, but it’s usually over quickly. You’ll lie on your side for a few minutes afterward to prevent any leakage.

What the Results Mean

High protein levels in CSF might suggest inflammation, infection, or a breakdown of the blood-brain barrier. Low levels could be normal or may indicate certain neurological conditions. Your doctor will interpret results in the context of your symptoms and medical history.

Common Conditions This Test Helps Diagnose

This test is often used to diagnose or monitor conditions like meningitis, encephalitis, multiple sclerosis, Guillain-Barré syndrome, or other inflammatory or infectious processes in the central nervous system.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CSF Protein (BCG Turb)

Frequently asked questions

What does a high or low protein level in CSF usually mean?
A high protein level may indicate inflammation, infection, or a breakdown of the blood-brain barrier. A low protein level is less common and may need further investigation with your doctor to rule out other conditions.
How long will it take to get my results?
Results are typically available within 1 to 3 business days, depending on your lab. Your doctor will contact you once they are ready.
Can I eat or drink before this test?
You can eat and drink normally before this test, as no special preparation is required.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy