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SARS-CoV-2 Nucleic Acid Gene Saliva Test (Qualitative)

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

This test detects genetic material from the virus that causes COVID-19 in your saliva. It helps determine if you have an active infection.

Quick summary

["A COVID-19 test using saliva to check for the virus’s genetic material."]

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

Key facts at a glance

LOINC
96958-4
Short code
SARS-CoV-2 N gene Sal Ql NAA N2
Synonyms
SARS-CoV-2 N gene Sal Ql NAA N2
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-cdc-primer-probe-set-n
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

Why This Test Is Done

Your healthcare provider may recommend this test if you have symptoms of COVID-19, such as fever, cough, or fatigue, or if you’ve been exposed to someone with the virus. It can also be used as part of screening for asymptomatic individuals in certain settings, like schools or workplaces.

How the Test Works

A small sample of saliva is collected from your mouth. The sample is then tested for the presence of SARS-CoV-2 genetic material using a molecular method (often polymerase chain reaction, or PCR). If the virus is detected, it means you likely have an active infection.

Sample Collection Process

You’ll likely be asked to spit into a provided container. The sample is collected in the morning or at a specified time for consistency. Avoid eating, drinking, or brushing your teeth for at least 30 minutes before testing to ensure accuracy.

What the Results Mean

A positive result indicates the presence of the virus’s genetic material, suggesting you may be contagious and could spread the virus to others. A negative result means the test did not detect the virus at the time of testing, but this does not guarantee you are not infected.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is crucial for diagnosing active COVID-19 infections, guiding treatment decisions, and controlling outbreaks. Early detection helps prevent the spread of the virus and allows for timely medical intervention if needed. It may also be used to monitor recovery or assess exposure risk in certain situations.

Short name

SARS-CoV-2 RNA in Saliva

Frequently asked questions

What does a positive result mean?
A positive result means the test detected genetic material from the virus that causes COVID-19 in your saliva. This suggests you are likely infected with the virus at the time of testing and may be contagious. You should follow your healthcare provider’s advice regarding isolation and further testing or treatment.
Can a negative result mean I don’t have COVID-19?
A negative result means the test did not detect the virus’s genetic material in your saliva at the time of testing. However, COVID-19 can sometimes be difficult to detect early or if the virus is present in lower amounts. You may still be infected and contagious, so monitor for symptoms and consult your healthcare provider if you develop any new signs of illness.
How soon after exposure can I get tested?
This test is most accurate when taken within a few days after exposure or symptom onset. If you’ve been exposed, follow your healthcare provider’s guidance on when to get tested, as timing can affect results. Early testing increases the likelihood of detecting the virus.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

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