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Plasma or serum viral RNA probe for detection (e.g., SARS-CoV-2, other respiratory viruses)

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

This test detects genetic material from certain viruses in your blood or serum. It helps identify if you have an active viral infection.

Quick summary

["This test checks for viral RNA, which can indicate recent infection by certain viruses."]

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

Key facts at a glance

LOINC
75542-1
Short code
HAV RNA Plas Donr NAA+probe-Imp
Synonyms
HAV RNA Plas Donr NAA+probe-Imp
Category
chemistry
Sample
plasma
Container
Lavender-top (EDTA) or Green-top (Heparin)
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

What This Test Measures

The test uses a specialized probe to detect viral RNA fragments in your sample. Viral RNA is genetic material that viruses use to replicate. If present, it suggests an active infection by the virus being tested for.

How the Test Works

A small amount of your blood or serum is collected and analyzed in a lab. The probe binds to viral RNA if it’s present, triggering a detectable signal. This signal confirms whether the virus is active in your system.

Why It’s Done

This test may be used to diagnose respiratory infections, monitor viral load, or confirm exposure to specific viruses in clinical or research settings.

Sample Collection

Blood is drawn from a vein in your arm, and the serum or plasma is separated for testing. The test does not require fasting or special preparation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Viral RNA Probe Test

Frequently asked questions

This test is primarily used in research or specialized clinical settings to detect viral genetic material. It may support diagnosis of infections where traditional tests are unavailable or less sensitive.
This test is not a replacement for standard diagnostic tests like PCR or antibody tests. Results should be interpreted by a healthcare provider in the context of your symptoms and medical history.
How long does it take to get results?
Results are typically available within 24 to 72 hours, depending on lab processing times. Your healthcare provider will discuss the timeline with you before testing.
What does a positive result mean?
A positive result indicates the presence of viral RNA, which may suggest an active infection. However, further testing or clinical correlation is often needed to confirm the specific virus and guide treatment.
  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