Cerebrospinal Fluid (CSF) Meningeal Polysaccharide Antibody Screening (Qualitative)
This test checks for antibodies against bacterial polysaccharides in your cerebrospinal fluid (CSF). It helps identify if an infection is causing inflammation in your brain or spinal cord.
["This test helps diagnose meningitis or other infections affecting your central nervous system."]
Key facts at a glance
- LOINC
- 17332-8
- Short code
- N men Polyval Ag CSF Ql
- Synonyms
- N men Polyval Ag CSF Ql
- 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
What This Test Measures
The test detects the presence of antibodies specific to certain bacterial polysaccharides in your CSF. These antibodies are produced in response to infections like bacterial meningitis. The method used is an immunoassay, which measures the antibody levels qualitatively (yes/no presence).
Why It’s Done
Your doctor may order this test if you have symptoms like severe headache, fever, stiff neck, confusion, or other signs of infection in the brain or spinal cord. It’s particularly useful in diagnosing meningitis or other conditions where bacterial infections are suspected.
Sample Collection and Preparation
A small amount of CSF is collected through a procedure called a lumbar puncture (spinal tap). This involves inserting a needle into your lower back to draw fluid from your spinal canal. The sample is then sent to the lab for testing.
What to Expect Before the Test
You may be asked to stay hydrated before the test. Avoid heavy meals or alcohol before the procedure. Inform your doctor about any medications you’re taking, as some may affect the test results or increase the risk of complications.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Positive results for these antibodies suggest an active bacterial infection in the meninges (the protective layers around the brain and spinal cord). This can confirm conditions like bacterial meningitis and guide treatment decisions, such as starting antibiotics. Negative results do not rule out infection, so other tests or clinical evaluation may be needed.
Short name
CSF Meningitis Screen (Qualitative)
Frequently asked questions
How long does it take to get results from this test?
Can I eat or drink before this test?
Is there any pain or discomfort associated with this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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