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SARS-CoV-2 Genomic Nucleic Acid Detection by Qualitative Probe-Based Assay

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

This test checks for the presence of genetic material from the virus that causes COVID-19 in your sample. It helps determine if you may have an active infection.

Quick summary

["A simple test to identify possible COVID-19 infection by detecting viral genetic material."]

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

Key facts at a glance

LOINC
96764-6
Short code
SARS-CoV-2 E gene Ct Resp Qn NAA+probe
Synonyms
SARS-CoV-2 E gene Ct Resp Qn 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

This test works by detecting specific markers in a small sample from your body that may point to a particular health condition. A laboratory analyzes the sample and provides your healthcare provider with important information that helps confirm a diagnosis and guide the right treatment plan for you.

The test uses a specialized probe to detect specific genetic sequences unique to the SARS-CoV-2 virus. This genetic material is found in samples taken from your respiratory tract, such as nasal or throat swabs. If the virus is present, the test will identify it.

Your sample is usually collected at a clinic, hospital, or laboratory, and sometimes it can be gathered at home. Depending on the type of test, collection may involve a quick blood draw, a swab from your nose or throat, or a urine sample. The process takes only a few minutes, and most people find it easy and only slightly uncomfortable.

A healthcare provider will collect a sample from your nose or throat using a swab. The sample is then sent to a lab for testing. This process is quick and typically done in a clinic or doctor’s office.

After your sample is collected, it is sent to a laboratory for analysis, and you can usually return to your normal activities right away. You may notice mild soreness, redness, or a small bruise at the collection site, but this normally fades within a day or two. Your healthcare provider will contact you to review the results and discuss any next steps.

Results are usually available within a few hours to a couple of days, depending on lab processing times. You’ll receive instructions on what to do based on the results, such as isolation or next steps for treatment.

This test may be used when you have symptoms that suggest a certain condition, when your doctor needs to confirm or rule out a diagnosis, or as part of routine screening or ongoing monitoring. It can also help check how well a treatment is working or track changes in your health over time.

This test is commonly used for diagnosing active COVID-19 infections, especially when symptoms are present or if you’ve been exposed to the virus. It may also be used in screening or monitoring for infection in certain settings.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

SARS-CoV-2 RNA Test (Qualitative)

Frequently asked questions

This test is critical for identifying active COVID-19 infections, guiding treatment decisions, and controlling the spread of the virus. Positive results indicate the presence of the virus and may require isolation and further medical evaluation. Negative results suggest no active infection, but they do not rule out past infection or immunity.
Can this test produce a false positive or false negative result, and if it does, what would that mean for my diagnosis and follow-up care?
False results can occur due to sample handling errors, insufficient viral load, or timing of testing. If you have symptoms of COVID-19 and test negative, follow-up testing may be recommended. False positives are rare but can happen if other respiratory viruses are present.
How long does it usually take for my test results to be processed, and how soon will my healthcare provider share them with me?
Results are typically available within 24 hours for most labs, but some may take longer depending on the lab’s workflow and testing volume. Your healthcare provider will contact you with the results as soon as they are available.
No special preparation is needed. You can eat, drink, or take medications as usual on the day of the test. Avoid using nasal decongestants or sprays before the test, as they may affect sample collection.
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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