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Fluorescent Antibody Antibody-Specific Binding Test for Viral Antigen (e.g., Influenza)

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

This test detects specific proteins from certain viruses, including influenza, in your respiratory secretions. It helps determine if you may have an active infection.

Quick summary

["Quickly checks for flu-related viruses in your nasal or throat swab."]

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

Key facts at a glance

LOINC
24215-6
Short code
FLUAV Ab sp1 Titr Ser CF
Synonyms
FLUAV Ab sp1 Titr Ser CF
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
comp-fix
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

How the Test Works

A swab is taken from your nose or throat to collect a sample of respiratory secretions. The sample is then tested using a fluorescent antibody method to identify viral antigens. This process can often provide results in minutes.

What to Expect Before the Test

No special preparation is needed. You may have a slight discomfort from the swab, but it usually doesn’t cause pain. If you’re using nasal spray or drops, avoid them for a few hours before the test.

What to Expect During the Test

The test is quick and typically done in a doctor’s office or clinic. You’ll be asked to blow your nose gently or use a swab to collect a sample from your nasal passage or throat.

What to Expect After the Test

You can return to your normal activities immediately. There may be mild discomfort or irritation from the swab, but this usually resolves quickly. Avoid touching your face after the test to prevent spreading any potential virus.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is primarily used for rapid diagnosis of influenza or other respiratory viral infections. It can help healthcare providers make quicker decisions about treatment, such as prescribing antiviral medications if appropriate. Results can guide decisions about isolation or further testing if needed.

Short name

Influenza Antigen Test (Qualitative)

Frequently asked questions

Why was I asked to have this test?
Your healthcare provider may recommend this test if you have symptoms like fever, cough, sore throat, or body aches, especially if you’ve been exposed to someone with a respiratory illness. It helps determine if a viral infection is likely and guides next steps in care.
What does a positive result mean?
A positive result indicates the presence of viral antigens in your sample, suggesting you may have an active viral infection such as the flu. This does not confirm the exact type of virus but helps guide further testing or treatment options.
What does a negative result mean?
A negative result means the test did not detect viral antigens in your sample. However, it’s possible you have a viral infection that hasn’t yet developed detectable antigens, or another type of illness. Follow-up testing or monitoring may still be recommended by your healthcare provider.
  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