Coxsackievirus B6 Antibody Test, Cerebrospinal Fluid (CSF)
This test detects antibodies against Coxsackievirus B6 in your cerebrospinal fluid (CSF), the clear fluid that surrounds your brain and spinal cord, to help your doctor diagnose viral infections of the brain and nervous system.
{"The test looks for antibodies to Coxsackievirus B6 in the fluid surrounding the brain and spinal cord","It helps doctors diagnose viral meningitis, encephalitis, or other neurological infections","A positive result indicates the body is fighting a Coxsackievirus B6 infection","The test uses a special laboratory method called complement fixation","Results are interpreted along with your symptoms and other test findings"}
Key facts at a glance
- LOINC
- 9764-2
- Short code
- CVB6CF
- Synonyms
- CV B6 Ab Titr CSF CF
- Category
- cardiac
- Sample
- csf
- Container
- Sterile CSF collection tube (plain glass or polypropylene)
- Units
- N/A
- Ref low
- 0
- Ref high
- 4
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 0 years
- Method
- comp-fix
- CPT
- 86658
- SNOMED
- 371949004
- Specimen volume
- 1-2 mL of cerebrospinal fluid
- Stability
- Store at 2-8°C if testing delayed; stability up to 72 hours. Avoid repeated freeze-thaw cycles.
- Hemolysis max
- 200
- TAT
- 72–168 hours
- Order
- routine
What is this test?
The Coxsackievirus B6 antibody test is a laboratory test that detects whether your body has produced specific antibodies against Coxsackievirus B6 in the cerebrospinal fluid (CSF). CSF is the clear fluid that surrounds and protects your brain and spinal cord. The test uses a method called complement fixation, which can identify whether your immune system has responded to this particular virus.
Why might I need this test?
Your doctor may order this test if you have symptoms suggesting a neurological infection, such as meningitis or encephalitis. These symptoms may include severe headache, fever, stiff neck, confusion, seizures, or sensitivity to light. Coxsackievirus B6 is part of a group of viruses that can cause inflammation of the brain lining (meningitis) or brain tissue (encephalitis), as well as other complications affecting the heart (myocarditis) and muscles.
How is the sample collected?
The sample is cerebrospinal fluid, which is collected through a procedure called a lumbar puncture (spinal tap). During this procedure, a healthcare provider inserts a thin needle between two vertebrae in your lower back to withdraw a small amount of CSF. The area is numbed first to minimize discomfort. The sample is then sent to a laboratory for analysis.
What do the results mean?
A positive result means that antibodies against Coxsackievirus B6 were detected in your CSF, indicating that you have or recently had an infection with this virus. A negative result means no antibodies were detected, but this does not completely rule out infection—it may be too early in the illness for antibodies to develop, or your symptoms may be caused by a different organism. Your doctor will interpret these results together with your clinical symptoms, physical examination, and other test results.
Are there any risks?
The main risk associated with this test is the lumbar puncture used to collect the CSF. These risks are rare but can include headache, bleeding, infection, or back discomfort. The procedure is performed by trained healthcare professionals who take precautions to minimize these risks.
Reference range
Negative: <1:4; Equivocal: 1:4; Positive: ≥1:8 (laboratory-specific interpretation)N/A
Patient should be informed about the lumbar puncture procedure. No fasting required. Maintain normal hydration. Inform physician of any bleeding disorders or anticoagulant medications.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Coxsackievirus B6 is one of six strains of Coxsackievirus group B that can cause neurological infections. Detection of specific IgM antibodies in CSF indicates recent or current infection, while IgG antibodies suggest past exposure. This test is particularly valuable in diagnosing viral meningitis and encephalitis when other common causes have been ruled out. Coxsackievirus infections are more common in summer and fall months. While most people recover fully with supportive care, severe cases may require hospitalization, particularly in infants, elderly individuals, or those with weakened immune systems.
Frequently asked questions
How long does it take to get results?
Do I need to fast before this test?
Can this test diagnose other Coxsackievirus strains?
Is a positive result serious?
How is Coxsackievirus B6 infection treated?
Sources
- 1
- 2Viral Meningitis - CDCSource
- 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