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Yersinia IgA Antibody, Serum

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

This test measures the presence of Immunoglobulin A (IgA) antibodies against *Yersinia* bacteria, which can cause infections like gastroenteritis or other illnesses.

Quick summary

["Detects past or current exposure to *Yersinia* bacteria through IgA antibodies in your serum."]

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

Key facts at a glance

LOINC
57001-0
Short code
Yersinia IgA Ser IA-aCnc
Synonyms
Yersinia IgA Ser IA-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
CPT
82784
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

IgA antibodies are part of your immune system’s response to infections. This test checks for antibodies specific to *Yersinia*, a genus of bacteria that may cause food poisoning or other infections. The presence of these antibodies suggests prior exposure or an ongoing immune reaction.

Why It Might Be Ordered

Your healthcare provider may recommend this test if you’ve had symptoms like diarrhea, abdominal pain, or fever that could be linked to a *Yersinia* infection, especially after consuming contaminated food or water. It may also be used in research or diagnostic screening contexts.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample from a vein in your arm. The test is typically done in a lab and results are usually available within a few days.

What the Results Mean

Results are qualitative (positive/negative) and indicate whether IgA antibodies were detected. A positive result suggests a past or current immune response to *Yersinia*, but it does not confirm an active infection without additional clinical correlation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

IgA Antibody to Yersinia (Serum)

Frequently asked questions

How long will it take to get my results?
Results are generally available within 3–5 business days, depending on lab processing times. Your healthcare provider will discuss the results with you during your follow-up visit.
Can I have this test if I’m pregnant?
This test is generally considered safe during pregnancy, as it involves a simple blood draw and does not expose you to harmful substances. However, always discuss any tests with your healthcare provider before proceeding.
What if my results are positive?
A positive result means your body has detected IgA antibodies to *Yersinia*, which may indicate past exposure or an immune response. Further testing or clinical evaluation may be needed to determine if an active infection is present, as symptoms can vary widely.
  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