Human Immunodeficiency Virus (HIV) RNA Viral Load by CSF Sequencing
This test measures the amount of HIV genetic material (RNA) in your cerebrospinal fluid (CSF). It helps doctors monitor how well your HIV treatment is working in your brain and spinal cord.
["This test assesses HIV activity in the central nervous system (CNS)."]
Key facts at a glance
- LOINC
- 88542-6
- Short code
- HIV 1 RNA IN Mut Det CSF Seq
- Synonyms
- HIV 1 RNA IN Mut Det CSF Seq
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- sequencing
- CPT
- 86701
- Specimen volume
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Your doctor may order this test if you have HIV and symptoms or signs that suggest your virus is active in your brain or spinal cord, such as headaches, confusion, or neurological problems. It’s also used to check if your treatment is controlling HIV in these areas.
How the Test Works
A small sample of your CSF is collected through a procedure called a lumbar puncture (spinal tap). The lab then uses advanced sequencing technology to detect and measure HIV RNA, which indicates viral activity.
What to Expect Before the Test
No special preparation is needed, but you may be asked to fast or avoid certain medications. On the day of the test, you’ll likely receive local anesthesia at the injection site, and you may feel a brief pinch during the procedure.
What to Expect During the Test
The test involves lying on your stomach with your back arched. A needle is inserted into your lower back to collect CSF. You may feel pressure or a mild ache, but the procedure usually takes about 15–30 minutes.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
High levels of HIV RNA in CSF can signal active HIV infection in the CNS, which may require adjustments to your treatment plan. Low or undetectable levels suggest your treatment is effectively controlling the virus in these areas, reducing the risk of neurological complications.
Short name
HIV RNA CSF Viral Load
Frequently asked questions
What Does a High Viral Load Mean?
What If My Viral Load Is Low or Undetectable?
How Often Should I Get 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