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Influenza Virus Culture (Serum/Plasma)

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

This test checks for the presence of the influenza virus in your blood or body fluids using a culture method. It helps determine if you have an active viral infection caused by influenza.

Quick summary

["Influenza virus culture helps diagnose active flu infection from your blood or fluids."]

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

Key facts at a glance

LOINC
80204-1
Short code
FLUAV + FLUBV Nph Shell Vial Cult
Synonyms
FLUAV + FLUBV Nph Shell Vial Cult
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
shell-vial-culture
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 Does

A culture test involves growing virus particles from a sample of your blood or body fluid in a lab setting. If influenza viruses are present, they will grow and can be identified. This method is useful for confirming an infection that may not be detected by rapid antigen tests or other lab tests.

How the Test Works

Your blood or fluid sample is placed in a controlled environment where viruses, if present, multiply. After several days, the lab examines the sample to see if influenza viruses have grown. This process helps identify the specific type of influenza virus, if any.

Why It’s Done

Doctors may order this test if you have symptoms like fever, cough, or sore throat and suspect influenza. It’s particularly useful for diagnosing cases where other tests are inconclusive or for identifying resistant strains.

Preparation

No special preparation is needed. You may have a blood draw or provide a sample of bodily fluid (like saliva or nasal swab fluid) depending on the clinical indication. Follow your healthcare provider’s instructions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Influenza Virus Culture

Frequently asked questions

What does a positive result mean?
A positive result indicates the presence of the influenza virus in your sample, confirming an active infection. This can guide treatment decisions, such as starting antiviral medications early to reduce severity.
What does a negative result mean?
A negative result means no influenza virus was detected in the sample. However, it’s important to note that false negatives can occur, especially if the sample was taken too early in the infection or if the virus load is low. Symptoms may persist, so monitor for ongoing illness.
How long does it take to get results?
Results typically take 3 to 7 days, depending on lab processing times. Your healthcare provider will discuss the results with you once they are available.
  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