Skip to content

Quantitative probe for viral RNA in serum/plasma (e.g., SARS-CoV-2, HIV, hepatitis viruses)

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

This test detects specific genetic material (RNA) from certain viruses in your blood. It helps determine if you have an active infection.

Quick summary

["Assists in diagnosing viral infections by measuring viral genetic material in your blood."]

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

Key facts at a glance

LOINC
38469-3
Short code
C trach rRNA Bld Ql Probe
Synonyms
C trach rRNA Bld Ql Probe
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What This Test Measures

This test looks for the presence of viral RNA in your serum or plasma. RNA is a molecule found in viruses that can be detected using a specialized probe. The test helps confirm if a virus is actively replicating in your body.

How the Test Works

The test uses a molecular probe to identify and quantify viral genetic material. This process is highly sensitive and can detect very small amounts of RNA from specific viruses.

Why It’s Done

Your healthcare provider may order this test if you have symptoms of a viral infection, such as fever, fatigue, or flu-like symptoms, or if you have been exposed to a virus that causes infection detectable by RNA probes.

What to Expect Before the Test

No special preparation is needed for this test. You may have a small needle inserted into your arm or vein to draw a blood sample. If you are taking blood from your own arm, you may use an antiseptic wipe to clean the area.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is crucial for diagnosing active viral infections early. Detecting viral RNA can confirm the presence of a virus before symptoms appear or when symptoms are mild. It can also help monitor the effectiveness of treatments and guide decisions about isolation or further medical care.

Short name

Viral RNA Probe

Frequently asked questions

How long does it take to get results from this test?
Results from this test are typically available within a few days, depending on your healthcare provider’s lab processes. Your doctor will discuss the results with you during your follow-up visit.
What does a positive result mean?
A positive result indicates the presence of viral RNA in your blood, suggesting an active viral infection. This does not necessarily mean you are contagious, but it confirms the virus is present and may require further medical evaluation.
Can I have this test if I am pregnant or breastfeeding?
Yes, this test can be performed during pregnancy or while breastfeeding. However, always inform your healthcare provider about your pregnancy or breastfeeding status before the test, as some medications or conditions may need to be considered.
  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