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Cerebrospinal Fluid Antibody Titers (Neurological Antibody Profile)

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

This test measures antibody levels in your cerebrospinal fluid (CSF) to help identify certain immune-related conditions affecting the brain and spinal cord.

Quick summary

["This test helps diagnose or monitor conditions linked to abnormal immune responses in the central nervous system."]

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

Key facts at a glance

LOINC
27318-5
Short code
M pneumo Ab Titr CSF IF
Synonyms
M pneumo Ab Titr CSF IF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

What This Test Measures

The test detects specific antibodies in your CSF, which may be elevated in conditions like multiple sclerosis, neuromyelitis optica, or other autoimmune or inflammatory diseases of the nervous system. Antibodies are proteins produced by your immune system in response to certain infections or diseases.

Why It’s Done

Your doctor may order this test if you have symptoms like vision problems, muscle weakness, numbness, or balance issues that could suggest a neurological condition. It’s also used to monitor disease progression or response to treatment.

Sample Collection and Preparation

A small amount of CSF is collected through a procedure called lumbar puncture (spinal tap). The fluid is then analyzed in a lab to measure antibody levels. This test is typically done in conjunction with other diagnostic tests.

Common Conditions Monitored

This test is often used to diagnose or track conditions such as multiple sclerosis, Guillain-Barré syndrome, or other demyelinating diseases where antibodies play a role in the immune response against the nervous system.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CSF Antibody Screening

Frequently asked questions

What does a positive result mean?
A positive result means your CSF contains antibodies that may be linked to an underlying neurological condition. Your doctor will review the results alongside your symptoms and other tests to determine the next steps, which may include further evaluation or treatment adjustments.
How long does it take to get results?
Results from this test are usually available within 1 to 3 business days, depending on lab processing times. Your healthcare provider will discuss the findings with you during your follow-up visit.
Is this test painful?
The lumbar puncture procedure can cause mild discomfort, but most people describe it as similar to having a deep needle stick. You may feel some pressure during the procedure, but you’ll be awake and able to communicate with your doctor. Local anesthesia is used to minimize pain.
  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