SARS-CoV-2 Nucleic Acid Detection by Reverse Transcription Polymerase Chain Reaction (RT-PCR) with RNA Probe
This test detects genetic material from the virus that causes COVID-19. It helps determine if you have an active infection.
["This test checks for COVID-19 virus presence using a simple nasal or throat swab sample."]
Key facts at a glance
- LOINC
- 105749-6
- Short code
- SARS-CoV-2 RNA BAL Ql NAA+probe
- Synonyms
- SARS-CoV-2 RNA BAL 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
How the Test Works
The test uses a special swab to collect cells from your nose or throat. These cells are then analyzed in a lab to look for the virus’s genetic material. If the virus is present, the test can detect it using a probe that binds to specific viral RNA sequences.
What to Expect Before the Test
You may need to fast or avoid certain medications before the test, depending on your healthcare provider’s instructions. Bring any medications you’re currently taking to your appointment.
What to Expect During the Test
The test is quick and painless. A healthcare provider will insert a swab into your nose or throat to collect a sample. You may feel a slight discomfort, but it usually lasts only a few seconds.
What to Expect After the Test
You can return to your normal activities immediately after the test. Avoid rinsing your mouth or nose with water for at least 15 minutes after the swab is removed to ensure accurate results.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is critical for diagnosing active COVID-19 infections. Positive results indicate the presence of the virus and may require isolation, treatment, or further testing. Negative results suggest no active infection, but they do not rule out past exposure or immunity. Results guide decisions about quarantine, treatment, and public health measures.
Short name
SARS-CoV-2 RT-PCR Test
Frequently asked questions
How long does it take to get results?
Can I have false-positive or false-negative results?
Is this test covered by insurance?
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