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Cerebrospinal Fluid (CSF) Antibody Profile by Immunoassay (Screening)

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

This test measures antibodies in your cerebrospinal fluid (the fluid surrounding your brain and spinal cord) to help identify potential infections, autoimmune conditions, or other neurological issues.

Quick summary

["This test helps diagnose conditions affecting your nervous system by checking for abnormal antibodies in CSF."]

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

Key facts at a glance

LOINC
109797-1
Short code
M pneumo Ab Msmt CSF
Synonyms
M pneumo Ab 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 Is Done

Your doctor may order this test if you have symptoms like headaches, neck stiffness, confusion, or neurological problems that could suggest an infection, inflammation, or immune response affecting your brain or spinal cord. It may also be used in research or specialized diagnostic scenarios.

What to Expect Before the Test

You’ll likely receive a spinal tap (lumbar puncture) where a small needle is inserted into your lower back to collect CSF. The procedure is quick but may cause mild discomfort. No special preparation is needed beyond staying hydrated.

What the Test Results Mean

Results identify specific antibodies present in your CSF, which can indicate conditions like meningitis, multiple sclerosis, or other neurological disorders. Interpretation depends on clinical context and may require follow-up testing.

Common Conditions This Test Helps Diagnose

This screening may help diagnose infections (e.g., bacterial or viral meningitis), autoimmune diseases (e.g., neuromyelitis optica), or other conditions causing abnormal immune responses in the central nervous system.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CSF Antibody Screen

Frequently asked questions

What does a positive result mean?
A positive result indicates the presence of certain antibodies in your CSF, which may suggest an infection, autoimmune disease, or other neurological condition. Your doctor will discuss next steps, such as further testing or treatment options.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Follow-up with your healthcare provider is recommended for interpretation.
Is this test covered by insurance?
Check with your insurance provider to confirm coverage, as this specialized test may require prior authorization or be part of a diagnostic panel.
  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