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Listeria species culture (serum)

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

This test checks for the presence of *Listeria*, a type of bacteria that can cause serious infections, especially in people with weakened immune systems or pregnant individuals. It involves growing bacteria from your blood sample in a lab.

Quick summary

["A blood culture helps detect infections caused by *Listeria* bacteria, which can be life-threatening if untreated."]

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

Key facts at a glance

LOINC
6609-2
Short code
Listeria Spec Cult
Synonyms
Listeria Spec 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

Why Is This Test Done?

Your healthcare provider may order this test if you have symptoms like fever, chills, muscle aches, or confusion—especially if you’ve recently eaten contaminated food, have an underlying health condition, or are pregnant. It’s also used to diagnose infections in people with weakened immune systems or those with blood disorders.

How Is the Test Performed?

A blood sample is drawn from a vein in your arm. The blood is placed in special containers that support bacterial growth. The sample is then sent to a lab, where it’s cultured over several days to check for *Listeria* bacteria.

What Are Possible Results?

If *Listeria* bacteria are found, your provider will confirm the result and may prescribe antibiotics. If no bacteria are detected, it means no *Listeria* was identified in this sample. Results can take days to weeks to confirm.

What Does This Test Mean for My Health?

Positive results indicate a bacterial infection that requires immediate medical attention. Negative results mean no *Listeria* was found in this sample, but other infections or causes of symptoms should still be evaluated.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Listeria Blood Culture

Frequently asked questions

What are the risks or side effects of this test?
The most common side effect is mild pain or bruising at the injection site. Rarely, there may be a slight reaction at the needle stick, such as redness or swelling.
How long does it take to get the results of this test?
Results can take several days to a few weeks, depending on the lab’s processing time and whether additional testing is needed to confirm the bacteria.
Can I eat or drink before this test?
You can eat and drink normally before the test unless your provider gives specific instructions. Blood cultures are typically done when you’re well-hydrated and rested.
  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