Cerebrospinal fluid (CSF) DNA probe analysis for quantitative measurement of specific genetic sequences
This test checks for certain DNA sequences in your cerebrospinal fluid (the fluid around your brain and spinal cord) using a genetic probe. It may help evaluate conditions affecting the central nervous system, such as genetic disorders or certain infections.
["This test helps identify genetic markers in your brain’s fluid that could relate to neurological or genetic conditions."]
Key facts at a glance
- LOINC
- 95764-7
- Short code
- CAURISU
- Synonyms
- C auris DNA Ur Ql NAA+n-prb
- Category
- chemistry
- Sample
- urine
- Container
- Sterile, leak-proof urine collection container (preferably a primary container without preservatives) or a urine transport tube suitable for molecular testing
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- non-probe-amp-tar
- CPT
- 87798
- SNOMED
- 122450008
- Specimen volume
- 10-50 mL of urine; minimum 1-2 mL required for molecular testing
- Stability
- Refrigerated (2-8°C): up to 7 days; Frozen (-20°C or lower): up to 30 days. Transport to laboratory as soon as possible. If delayed, refrigerate specimen.
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 24–72 hours
- Order
- routine
What Does This Test Measure?
The test detects and quantifies specific DNA fragments in your cerebrospinal fluid. These sequences may be linked to inherited genetic conditions, infections, or other neurological abnormalities. The probe binds to these sequences, allowing for precise measurement of their presence and concentration.
Why Might You Need This Test?
Your healthcare provider may recommend this test if you have symptoms like unexplained headaches, seizures, movement disorders, or if there’s a family history of genetic neurological diseases. It can also be used to monitor certain genetic conditions or guide treatment decisions.
Sample Collection and Preparation
A small amount of cerebrospinal fluid is collected through a procedure called a lumbar puncture (spinal tap). The fluid is then processed in a lab to extract and analyze the DNA sequences using the genetic probe method.
What to Expect Before the Test
You’ll typically be asked to fast for a few hours before the procedure, though this may vary. Wear comfortable clothing, and inform your doctor about any medications you’re taking, as some may affect the test results or procedure.
Reference range
Negative (Not Detected)N/A
No special patient preparation required. Standard urine collection techniques should be followed. For catheterized patients, specimen should be collected from the sampling port using aseptic technique.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
CSF DNA Testing
Frequently asked questions
How is the DNA probe used in this test?
What conditions might this test detect?
Do I need to prepare for this test in any special way?
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