Influenza A or B Nucleic Acid Detection by Qualitative Polymerase Chain Reaction (PCR) in Respiratory Specimen
This test checks for the presence of genetic material from influenza viruses (A or B) in a sample taken from your nose or throat. It helps determine if you have an active infection that may require antiviral treatment.
["A quick way to identify flu infection and guide treatment decisions."]
Key facts at a glance
- LOINC
- 108175-1
- Short code
- FLUAV H1 2009 RNA Spec Ql NAA-np
- Synonyms
- FLUAV H1 2009 RNA Spec Ql NAA-np
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- non-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 small sample of your nasal or throat secretions (collected via a swab). Specialized lab equipment amplifies and detects the virus’s genetic material using PCR technology. Results are reported as either positive (virus present) or negative (no virus detected).
When You Might Need This Test
Your healthcare provider may recommend this test if you have flu-like symptoms (fever, cough, sore throat, body aches) and suspect influenza, especially during flu season. It’s also used in outbreaks or for rapid diagnosis in healthcare settings.
What to Expect Before the Test
No special preparation is needed. The swab is inserted gently into your nose or throat, and you may experience mild discomfort. Avoid smoking or using nasal sprays 15–30 minutes before testing if possible.
What to Expect During the Test
The test takes about 15–30 minutes. You’ll sit comfortably while the swab is collected. The lab processes the sample separately and returns results within hours or the next day.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Positive results confirm an active flu infection and may prompt immediate antiviral treatment to reduce severity or shorten illness duration. Negative results rule out flu but don’t rule out other respiratory illnesses. Early detection helps prevent spread to others.
Short name
Influenza PCR (Respiratory)
Frequently asked questions
How soon will I get my results?
What if my test is positive?
Can I still spread the flu if my test is negative?
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