Respiratory Syncytial Virus (RSV) Nucleic Acid Detection (Serum/Plasma)
This test checks for the presence of RSV genetic material in your blood or plasma to help diagnose infections caused by the respiratory syncytial virus.
["Determines if RSV may be causing symptoms in your respiratory system."]
Key facts at a glance
- LOINC
- 33045-6
- Short code
- RSV Ag Nose Ql
- Synonyms
- RSV Ag Nose Ql
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- 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 have symptoms like coughing, wheezing, or difficulty breathing, especially if you’re at higher risk for severe RSV infections (e.g., young children, older adults, or those with weakened immune systems). It helps confirm whether RSV is the cause of your illness.
What to Expect Before the Test
No special preparation is needed. A blood sample is taken from a vein in your arm, similar to other blood tests. The sample is sent to a lab for analysis.
How the Test Works
The test detects RSV genetic material (RNA) using advanced laboratory techniques, such as polymerase chain reaction (PCR). This helps identify if the virus is actively present in your system.
Possible Results and Next Steps
A positive result means RSV genetic material was found, suggesting an active infection. A negative result means no detectable RSV was found at the time of testing. Your doctor will discuss next steps based on your symptoms and test results.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
RSV is a common virus that can cause severe respiratory illnesses, particularly in vulnerable populations. Early detection can guide treatment decisions, such as monitoring symptoms or considering supportive care, though antiviral treatments are limited for RSV.
Short name
RSV Nucleic Acid Test
Frequently asked questions
What does a positive test mean?
Currently, this test is typically performed in a clinical or laboratory setting. Home testing for RSV nucleic acids is not widely available.
No specific restrictions apply. However, inform your doctor about any medications or conditions that might affect test results.
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