DNA Probe for SARS-CoV-2 (Nucleic Acid Amplification Test)
This test detects genetic material from the virus that causes COVID-19 in your sample. It helps determine if you currently have an active infection.
["A COVID-19 test to check for the virus in your body."]
Key facts at a glance
- LOINC
- 85777-1
- Short code
- S marcescens DNA Bld Pos NAA+non-probe
- Synonyms
- S marcescens DNA Bld Pos NAA+non-probe
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- non-probe-amp-tar
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
How the Test Works
The test uses a specialized probe to identify the virus’s genetic material (nucleic acid) from a sample of your respiratory secretions, such as nasal or throat swab. If the virus is present, the test can detect it through a molecular process that amplifies the genetic material for analysis.
What to Expect Before the Test
You may receive instructions to avoid certain activities, such as smoking or using nasal decongestants, before testing. Wear a mask if you’re feeling unwell, as you may be contagious. Bring any medications you’re currently taking, as some may affect test results.
What to Expect During the Test
A healthcare provider will collect a sample from your nose or throat using a swab. You may experience a slight discomfort, but it usually lasts only a few seconds. The sample is then sent to a lab for analysis.
What to Expect After the Test
Results are typically available within 24 hours. If you receive a positive result, follow your healthcare provider’s guidance on isolation and next steps. If negative, you may still need to monitor symptoms or repeat testing if symptoms persist.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is critical for diagnosing active COVID-19 infections. A positive result confirms the presence of the virus and helps guide treatment, quarantine, and public health measures. A negative result means the virus was not detected in the sample at the time of testing, but it does not rule out infection if symptoms persist.
Short name
COVID-19 Nucleic Acid Test
Frequently asked questions
Why might I need this test?
What does a positive result mean?
What if I get a negative result but still feel sick?
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