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Respiratory Syncytial Virus (RSV) Nucleic Acid Detection by Probe-Based Assay

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

This test checks for the presence of respiratory syncytial virus (RSV) genetic material in your respiratory secretions. RSV is a common virus that can cause respiratory infections, especially in infants, older adults, and those with weakened immune systems.

Quick summary

["Determining if RSV is causing your symptoms can help guide treatment and prevent spread."]

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

Key facts at a glance

LOINC
101426-5
Short code
RSV B RNA Resp Ql NAA+probe
Synonyms
RSV B RNA Resp 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

Why This Test Is Done

Doctors may order this test if you or your child shows signs of a respiratory infection, such as coughing, wheezing, or difficulty breathing. It’s particularly useful for identifying RSV in children under 2 years old or adults with chronic health conditions that increase infection risk.

How the Test Works

A sample of your nasal or throat secretions is collected using a swab. The swab is then analyzed in a lab to detect RSV genetic material using a probe-based method, which is highly sensitive for confirming infection.

Sample Collection and Preparation

The test uses a simple nasal or throat swab to gather respiratory secretions. This is usually done by a healthcare provider in a clinic or hospital setting. The sample is then sent to a lab for immediate or rapid analysis.

What to Expect Before the Test

There are no special preparations needed for this test. You may experience mild discomfort from the swab, but it typically takes a few seconds. If you’re a child, the provider may use a numbing spray to ease the process.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

RSV Probe Test

Frequently asked questions

How long does it take to get results?
Results for this test are usually available within a few hours to a day, depending on the lab’s processing time. Rapid results may be available within minutes if the test is performed in a clinic or urgent care setting.
Can RSV be treated with this test alone?
No, this test only confirms the presence of RSV. Treatment typically involves supportive care like rest, hydration, and sometimes medication to relieve symptoms. If RSV is detected, your doctor may recommend specific care based on your symptoms and health status.
Is this test covered by insurance?
Whether your insurance covers this test depends on your plan and the reason for testing. It’s best to check with your insurance provider or ask your doctor to confirm coverage before the test.
  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