The Coxsackievirus B3 antibody test looks for immune proteins that your body makes to fight this virus, which belongs to the enterovirus family and can affect the heart as well as the brain and spinal cord. When the test is done on cerebrospinal fluid, the clear liquid around your brain and spinal cord, it helps your doctor find out whether the virus has reached your nervous system.
This test finds antibodies against Coxsackievirus B3 in your cerebrospinal fluid, helping your doctor diagnose viral infections that affect the brain and spinal cord so that appropriate care can be started.
{"Detects antibodies to Coxsackievirus B3 in cerebrospinal fluid","Helps diagnose viral meningitis, encephalitis, or when infection spreads to the nervous system","Often ordered when patients have symptoms of brain/spinal cord infection with potential heart involvement","Sample is collected via lumbar puncture (spinal tap)","Positive results indicate current or recent infection"}
Key facts at a glance
- LOINC
- 27917-4
- Short code
- CVB3 Ab CSF
- Synonyms
- CV B3 Ab CSF Ql
- Category
- cardiac
- Sample
- csf
- Container
- Sterile polypropylene container for CSF collection
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 0–120 years
- Method
- Enzyme-linked immunosorbent assay (ELISA) or Immunofluorescence assay (IFA)
- CPT
- 86658
- SNOMED
- 122442004
- Specimen volume
- 1-2 mL of CSF
- Stability
- Store at 2-8°C if testing within 24 hours. For longer storage, freeze at -70°C. Avoid repeated freeze-thaw cycles.
- Hemolysis max
- 200
- TAT
- 48–168 hours
- Order
- routine
What is this test?
The Coxsackievirus B3 antibody test detects the presence of immune proteins (antibodies) that your body produces in response to Coxsackievirus B3 infection. This virus is part of the enterovirus family and can affect multiple organs, including the heart and central nervous system (brain and spinal cord). When the test is performed on cerebrospinal fluid (CSF), it helps doctors determine if the virus has infected the nervous system.
Why is this test performed?
This test is ordered when a patient has symptoms suggesting a nervous system infection (such as meningitis or encephalitis) and the doctor suspects Coxsackievirus B3 as the cause. It is particularly important when there is concern about the infection spreading to the brain or spinal cord, or when a patient has both heart symptoms (like myocarditis) and neurological symptoms.
How is the sample collected?
The sample is collected through a procedure called a lumbar puncture or spinal tap. A healthcare provider inserts a thin needle between the bones in your lower back to collect a small amount of cerebrospinal fluid. The area is numbed with local anesthetic to reduce discomfort.
What do the results mean?
A positive result means that antibodies to Coxsackievirus B3 were detected in your cerebrospinal fluid, indicating that you have or recently had a Coxsackievirus B3 infection affecting your nervous system. A negative result suggests no current infection with this specific virus, though it does not rule out other causes of your symptoms.
Reference range
Not Detected - No evidence of Coxsackievirus B3 IgG or IgM antibodies in CSFN/A
No specific patient preparation required. Inform patient about lumbar puncture procedure. Obtain informed consent. Advise patient to remain hydrated.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Coxsackievirus B3 is a significant pathogen that can cause viral myocarditis (heart muscle inflammation), pericarditis, and aseptic meningitis. When found in CSF, it indicates the virus has invaded the central nervous system. This test helps differentiate viral from bacterial meningitis and guides appropriate management. Detection of antibodies in CSF rather than blood suggests the infection is specifically affecting the nervous system.
Frequently asked questions
Is this test painful?
How long does it take to get results?
Do I need to fast before this test?
What happens if the test is positive?
Sources
- 1
- 2
- 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