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Influenza Virus Culture (Serum)

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

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

Quick summary

["A positive result may indicate an influenza infection requiring treatment or monitoring."]

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

Key facts at a glance

LOINC
48310-7
Short code
FLUAV Spec Ql Cult
Synonyms
FLUAV Spec Ql 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
organism-specific-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 Measures

The test involves growing a sample of your blood serum in a controlled environment to see if influenza virus can multiply. If the virus is present, it will grow and can be detected after several days.

Why It’s Ordered

Your healthcare provider may order this test if you have symptoms like fever, cough, or sore throat that suggest influenza, especially if you’re at higher risk of complications or if you’ve been exposed to someone with influenza.

Sample Collection and Preparation

A blood sample is taken from a vein in your arm. The serum portion (liquid part without blood cells) is separated and sent to a lab for culture. Results may take several days to a week to confirm infection.

What to Expect Before the Test

No special preparation is needed, but inform your provider if you’re on blood-thinning medications or have bleeding disorders, as this may affect blood collection.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

A positive culture confirms an active influenza infection. This result is critical for diagnosing the virus, guiding treatment (such as antiviral medications), and preventing spread to others. A negative result means no active virus was detected in your sample at the time of testing.

Short name

Influenza Virus Culture

Frequently asked questions

How long does it take to get results?
Results typically take 3 to 7 days, depending on lab processing times. If you have urgent symptoms, your provider may recommend other tests for faster results.
Can I take antiviral medications before knowing the test results?
Yes, if you suspect influenza, you may start antiviral medications early, even before test results are available. These can help reduce symptoms and complications.
What if my test is positive but symptoms have improved?
A positive culture indicates an active infection at the time of testing. If symptoms improve, the virus may have cleared on its own, but ongoing monitoring may still be needed to prevent reinfection or complications.
  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