SARS-CoV-2 Nucleic Acid Test (Qualitative, Respiratory Specimen, Probe-Based)
This test detects genetic material from the virus that causes COVID-19 in your respiratory sample, helping confirm if you have an active infection.
["A COVID-19 test to check for the virus in your airways."]
Key facts at a glance
- LOINC
- 94745-7
- Short code
- SARS-CoV-2 RNA Ct Resp Qn NAA+probe
- Synonyms
- SARS-CoV-2 RNA 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
What This Test Measures
The test looks for the unique genetic material (RNA) of the SARS-CoV-2 virus in your respiratory sample, such as nasal or throat swab fluid. This is done using a molecular method that amplifies and identifies specific viral sequences, allowing for highly sensitive detection of the virus.
How the Test Works
Your sample is analyzed in a lab using a probe-based technique. The probe targets a specific region of the virus’s genetic code, binding to it if present. The test then detects and confirms the presence of viral RNA, providing a qualitative result (positive or negative).
When You Might Need This Test
This test is typically ordered if you have symptoms of COVID-19, have been exposed to someone with the virus, or are required for travel, work, or school purposes. It can also be used to monitor recovery or check for reinfection in high-risk situations.
What to Expect Before the Test
No special preparation is needed. You may be asked to rinse your mouth with water and avoid eating or drinking for 30 minutes before the test. A healthcare provider will collect a sample from your nose or throat using a swab.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
A positive result indicates the presence of the SARS-CoV-2 virus, confirming an active infection and guiding treatment and isolation decisions. A negative result means the virus was not detected in the sample at the time of testing, but this does not always rule out infection if testing was done too early. This test is critical for public health monitoring, identifying outbreaks, and managing outbreaks in communities.
Frequently asked questions
How soon can I expect results?
What if my test is positive?
Can I get this test 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