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Coxsackievirus B3 Antibody Test, Cerebrospinal Fluid (CSF)

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

This test measures antibodies against Coxsackievirus B3 in your cerebrospinal fluid (CSF), the clear liquid that surrounds your brain and spinal cord, to help diagnose viral infections affecting the brain, nervous system, or heart. A CSF sample is collected through a lumbar puncture (spinal tap), and the results help your doctor determine whether symptoms such as fever, headache, stiff neck, or confusion are caused by a recent or past Coxsackievirus B3 infection, so the right treatment can be chosen.

Quick summary

{"The test detects antibodies your body makes to fight Coxsackievirus B3","It uses a sample of cerebrospinal fluid collected via lumbar puncture","Positive results may indicate viral meningitis, encephalitis, or myocarditis","Results help doctors distinguish viral from bacterial infections","Treatment is supportive; most people recover fully"}

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

Key facts at a glance

LOINC
22229-9
Short code
CVB3CSF
Synonyms
CV B3 Ab Titr CSF
Category
cardiac
Sample
csf
Container
Sterile CSF collection tube (preferably polypropylene)
Units
N/A
Ref low
0
Ref high
1
Fasting
false
Population
adult
Sex
all
Age range
0–120 years
Method
Enzyme-linked immunosorbent assay (ELISA) or Indirect immunofluorescence assay (IFA)
CPT
86658
SNOMED
371949004
Specimen volume
1-2 mL of cerebrospinal fluid
Stability
Refrigerate at 2-8°C; stable for 48-72 hours. For longer storage, freeze at -70°C and avoid repeated freeze-thaw cycles.
Hemolysis max
200
TAT
72–168 hours
Order
routine

What is this test?

The Coxsackievirus B3 Antibody test detects specific antibodies (IgG and IgM) in your cerebrospinal fluid (CSF). CSF is the clear fluid that surrounds your brain and spinal cord. This test helps doctors determine if your nervous system symptoms are caused by a Coxsackievirus B3 infection.

Why is it ordered?

Your doctor may order this test if you have symptoms of a brain or nervous system infection, such as fever, headache, stiff neck, confusion, or seizures. It is particularly important because Coxsackievirus B3 can cause both neurological complications (like meningitis or encephalitis) and cardiac complications (like myocarditis). This test helps differentiate viral infections from bacterial infections, which is critical for determining the right treatment.

How is the sample collected?

A healthcare provider collects the cerebrospinal fluid sample through a procedure called a lumbar puncture (spinal tap). The patient typically lies on their side or sits leaning forward. The provider inserts a thin needle between two vertebrae in the lower spine to withdraw a small amount of CSF. The procedure takes about 15-30 minutes. You may feel some discomfort or pressure during the needle insertion.

What do the results mean?

Results are typically reported as a titer (a measure of how much antibody is present). A positive result means antibodies were detected in your CSF, suggesting a recent or past infection with Coxsackievirus B3. IgM antibodies indicate a recent infection, while IgG antibodies suggest a past infection or immunity. Your doctor will interpret these results together with your symptoms, physical exam, and other test findings.

Reference range

Negative or <1:4 titer; presence of IgM or significant rise in IgG titers indicates recent or active infectionN/A

Specimen: csf

Patient should be in lateral decubitus or sitting position for lumbar puncture. Informed consent required. Avoid contamination of sample with blood. Standard CSF collection precautions apply.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

Is this test painful?
The lumbar puncture may cause some discomfort or brief pain when the needle is inserted. Local anesthesia is often used to minimize pain. You may feel pressure or a headache afterward. Most patients tolerate the procedure well.
How long does it take to get results?
Results typically take 2-5 days, as the test requires specialized laboratory techniques to detect antibodies in the CSF.
Do I need to fast before this test?
No fasting is required for this test. However, you should follow your doctor's instructions regarding any medications or preparations before the lumbar puncture.
What is the treatment if the test is positive?
Treatment is primarily supportive and may include rest, fluids, pain relievers, and medications to manage specific symptoms. Most Coxsackievirus infections resolve on their own within 1-2 weeks. Severe cases may require hospitalization.
Can this infection be prevented?
Good hygiene practices can reduce the risk of Coxsackievirus infection: wash hands frequently with soap and water, avoid close contact with sick individuals, disinfect commonly touched surfaces, and avoid sharing utensils or cups.
  1. 1
    Coxsackievirus B3 - StatPearlsSource
  2. 2
    Enterovirus and Paramyxovirus Lab Testing - Stanford MedicineSource
  3. 3
    Viral Meningitis - CDCSource

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