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Asian Fluorescence Immunoassay for Respiratory Virus RNA (Qualitative, 24-Hour Fluid)

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

This test detects genetic material from certain respiratory viruses, including those that may cause colds, flu, or other infections.

Quick summary

["Helps identify possible viral infections in your respiratory tract."]

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

Key facts at a glance

LOINC
81321-2
Short code
FLUAV H5 Asian RNA Ct Resp Qn NAA H5b
Synonyms
FLUAV H5 Asian RNA Ct Resp Qn NAA H5b
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-primer-probe-set-h-b
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 RNA from respiratory viruses in your nasal or throat secretions. RNA is a molecule that carries genetic information from viruses. If present, it confirms the presence of a viral infection, though it does not specify which virus.

Why It’s Ordered

Your healthcare provider may order this test if you have symptoms like cough, sore throat, fever, or shortness of breath, especially if you’re at higher risk for severe illness or if you’ve been exposed to a known virus.

Sample Collection and Preparation

A swab is collected from your nose or throat, and the sample is tested for viral RNA within 24 hours. The test is qualitative, meaning it only tells you if the virus is present or not, not the exact amount.

Limitations and Considerations

This test can’t distinguish between active and past infections, and it may not detect all viruses. False negatives can occur if the sample is collected too early or if the virus is not actively replicating.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Identifying respiratory viruses helps guide treatment decisions, such as isolating you from others, recommending antiviral medications, or monitoring for complications. It’s particularly useful in settings like hospitals or clinics where rapid diagnosis is critical.

Short name

Viral RNA in Respiratory Secretions

Frequently asked questions

How long does it take to get results?
Results are typically available within 24 hours of sample collection, depending on lab processing times.
Can this test detect all respiratory viruses?
No, this test focuses on detecting viral RNA from certain respiratory viruses. It may not cover all possible viruses that can cause respiratory illness.
What if my test comes back positive?
A positive result means the virus is present in your sample. Your healthcare provider will discuss next steps, such as treatment options, isolation advice, or further testing if needed.
  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