Hepatitis B Virus Precore/Precore Mutant RNA Detection by Qualitative Probe-Based Nucleic Acid Amplification
This test checks for specific genetic changes in the hepatitis B virus (HBV) that may affect how the virus behaves or responds to treatment. It helps doctors monitor whether the virus has developed resistance or altered behavior, especially in patients receiving antiviral therapy.
["This test helps track HBV mutations that could impact treatment effectiveness and disease progression."]
Key facts at a glance
- LOINC
- 33633-9
- Short code
- HBV preC TAG Mut Ser Ql NAA+probe
- Synonyms
- HBV preC TAG Mut Ser Ql NAA+probe
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- probe-amp-tar
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Your healthcare provider may order this test if you have hepatitis B and are receiving antiviral treatment. It helps determine if the virus has developed resistance to current medications or if mutations are present that could affect your care plan.
What to Expect Before the Test
No special preparation is needed. A small blood sample will be taken from a vein in your arm, similar to a routine blood draw. The sample is processed to detect specific genetic sequences of the hepatitis B virus.
How the Test Results Are Used
Results guide treatment decisions. If mutations are found, your doctor may adjust your antiviral therapy to better target the virus’s altered form, ensuring more effective treatment.
What the Results Mean
A positive result indicates the presence of HBV precore/precore mutant RNA, which may suggest resistance to certain antiviral drugs or altered viral behavior. A negative result means no detectable mutations in this specific sequence were found.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Hepatitis B RNA (Mutant Screening)
Frequently asked questions
What are the possible causes of abnormal results?
How often will I need this test?
Can this test be done at home?
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