Listeria Antibody Detection by Qualitative Probe (Serum/Plasma)
This test checks for antibodies to *Listeria monocytogenes*, a bacteria that can cause serious infections, especially in vulnerable groups like pregnant people, newborns, or those with weakened immune systems. Antibodies indicate past or current exposure.
["This test helps determine if you’ve been exposed to *Listeria* and whether you may need further evaluation or treatment."]
Key facts at a glance
- LOINC
- 88265-4
- Short code
- Listeria sp tuf Bld Pos Ql Probe
- Synonyms
- Listeria sp tuf Bld Pos Ql Probe
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Ref low
- 0.8
- Ref high
- 1.2
- Critical range
- — – 5 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- probe
- CPT
- 85610
- SNOMED
- 396252006
- 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
Why This Test Is Done
Doctors may order this test if you have symptoms like fever, muscle aches, or gastrointestinal issues, especially after eating contaminated food. It’s also used in high-risk groups to monitor for infection, such as during pregnancy or after organ transplants.
What to Expect Before the Test
No special preparation is needed. A blood sample is taken from a vein in your arm. You may feel a small pinch, but it usually doesn’t cause discomfort. If you’re pregnant or have a history of bleeding disorders, let your provider know before the test.
What the Results Mean
A positive result means your body has detected antibodies to *Listeria*, suggesting exposure. A negative result means no detectable antibodies were found. Results alone don’t confirm infection; they may prompt further testing or medical evaluation.
Possible Risks and Considerations
The most common risk is mild bruising or discomfort at the needle site. Rarely, blood clots or infection can occur. If you’re pregnant, have a weakened immune system, or take certain medications, discuss these with your provider before testing.
Reference range
INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A
Inform your healthcare provider if you are taking blood thinners. No special preparation required.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is critical for identifying *Listeria* exposure, particularly in high-risk populations. While antibodies indicate past or current infection, they don’t always correlate with active illness. Results guide further diagnostic steps, such as culture tests or additional bloodwork, to confirm infection and guide treatment decisions.
Short name
Listeria Antibody Screen (Serum/Plasma)
Frequently asked questions
What does a positive result mean?
Can I get this test at home?
How soon will I get my results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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