SARS-CoV-2 Viral Genome Lineage Identification by Sequencing (Specimen: Whole Blood/Plasma)
This test analyzes a sample of your blood or plasma to identify specific genetic sequences associated with different variants of the SARS-CoV-2 virus. It helps determine which lineage (variant) of the virus is present in your body.
["This test helps healthcare providers understand the specific variant of COVID-19 you may have, which can inform treatment and public health decisions."]
Key facts at a glance
- LOINC
- 100157-7
- Short code
- SARS-CoV-2 lineage Spec Seq
- Synonyms
- SARS-CoV-2 lineage Spec Seq
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- sequencing
- 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
What This Test Measures
The test sequences genetic material (DNA) from your blood or plasma to detect and classify the SARS-CoV-2 virus’s lineage. By comparing your sample’s genetic code to known reference sequences, it identifies which variant (e.g., Delta, Omicron sublineages) is present. This is done through advanced sequencing technology that reads the virus’s genetic instructions in detail.
Why It Matters for You
Knowing the specific lineage of the virus can influence treatment recommendations, vaccine guidance, and monitoring of infection spread. For example, some variants may require different approaches for prevention or care, such as targeted therapies or updated vaccination protocols.
Sample Collection and Preparation
A blood sample (whole blood or plasma) is collected during a routine venipuncture procedure. The lab processes the sample to isolate viral genetic material, which is then sequenced to identify the virus’s lineage. This process typically takes several days to complete.
When This Test Is Ordered
Your healthcare provider may order this test if you have symptoms of COVID-19, have been exposed to a known variant, or if you are part of a study or surveillance program tracking virus lineages. It is also used in clinical settings where variant-specific monitoring is critical.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Lineage identification is vital for public health tracking, guiding vaccine development, and tailoring medical care. For example, variants with higher transmissibility or immune escape may prompt adjustments in prevention strategies or treatment protocols. This test supports real-time surveillance to monitor the evolution of the virus and inform public health responses.
Frequently asked questions
How long does it take to get results from this test?
Is this test covered by insurance?
Can I donate blood while having a positive COVID-19 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