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RNA III Antibody Screening by Line Blot

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

This test detects antibodies related to RNA III, a component of certain viruses, using a line blot assay. It helps identify potential infections or autoimmune responses.

Quick summary

["This screening may be used if you have symptoms or risk factors for viral infections or related conditions."]

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

Key facts at a glance

LOINC
89513-6
Short code
RNAp III Ab Ser Ql Line blot
Synonyms
RNAp III Ab Ser Ql Line blot
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
line-blot
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 Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like fever, fatigue, muscle pain, or if you’ve been exposed to a virus known to produce RNA III (e.g., certain arboviruses or rare pathogens). It may also be used in research or specialized diagnostic settings.

How the Test Works

The line blot assay detects specific antibodies in your blood that bind to RNA III. If antibodies are present, they will react with target lines on a test strip, indicating a potential immune response.

Sample Collection and Preparation

A blood sample is drawn from a vein in your arm. The sample is processed to separate serum or plasma, which is then tested directly in the line blot assay.

What to Expect Before the Test

No special preparation is needed, but inform your provider about any medications, recent illnesses, or allergies that could affect results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Positive results suggest an immune response to RNA III, which may indicate an active infection (e.g., arbovirus like West Nile virus) or an autoimmune condition. However, false positives can occur, so confirmatory testing may be needed. This test is not routinely used in standard clinical practice but may be part of specialized diagnostic workflows.

Short name

RNA III Antibody Screen

Frequently asked questions

What Does a Positive Test Mean?
A positive result may indicate exposure to a virus containing RNA III, but it doesn’t confirm a diagnosis. Further testing or clinical correlation is often required.
Can I Get This Test at Home?
No, this test is typically performed in a clinical or research laboratory using specialized equipment. Home testing kits are not available for this specific assay.
How Long Does It Take to Get Results?
Results are usually available within 1–3 business days, depending on laboratory processing times.
  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