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Competitive DNA Probe Test for Specific Antigen in Nasal or Oral Mucosa (e.g., Influenza Virus)

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

This test detects the presence of a specific virus (like influenza) in your nasal or mouth secretions using a DNA probe method.

Quick summary

["Quickly identifies possible viral infections in your upper respiratory tract."]

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

Key facts at a glance

LOINC
85772-2
Short code
E cloac comp DNA Bld Pos NAA+non-probe
Synonyms
E cloac comp DNA Bld Pos NAA+non-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
non-probe-amp-tar
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

How the Test Works

A small sample of fluid from your nose or mouth is collected and analyzed for genetic material from a targeted virus. The probe detects if the virus’s DNA is present, helping confirm infection early.

What to Expect Before the Test

No special preparation is needed. You may rinse your mouth with water afterward to remove any sample residue. If testing for influenza, symptoms like fever, cough, or sore throat may be present.

Common Uses

This test is often used to diagnose acute respiratory infections, such as flu, in patients with symptoms or those at higher risk for complications.

Limitations

Results may not be positive immediately after exposure and can sometimes be negative if the virus is still replicating. False negatives may occur if the sample is collected too early or if the virus load is low.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: Early detection of viral infections can guide faster treatment decisions, reduce spread, and help manage symptoms more effectively, especially in high-risk populations.

Frequently asked questions

Why might I need this test?
Your healthcare provider may recommend this test if you have symptoms of a viral illness, are at higher risk for complications, or if you’re in a setting where rapid diagnosis is critical (e.g., healthcare settings).
How long does it take to get results?
Results are typically available within minutes to a few hours, depending on the lab’s processing time and the testing method used.
Can I take anything before the test?
No special preparations are needed. However, avoid using nasal sprays or oral medications that could interfere with sample collection for 15–30 minutes before testing.
  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