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Yersinia enterocolitica Serology – Antibody Detection (IgM and IgG)

Published: August 9, 2026Updated: August 17, 2026

This test checks for antibodies against *Yersinia enterocolitica*, a bacteria that can cause foodborne illness. It helps determine if you’ve been exposed to this germ and whether your immune system has responded.

Quick summary

["This test helps diagnose infections caused by *Yersinia enterocolitica* and assesses past exposure."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
28549-4
Short code
Yersinia Stl Cult
Synonyms
Yersinia Stl Cult
Category
chemistry
Sample
stool
Container
Clean container
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
organism-specific-culture
CPT
84484
SNOMED
302774002
Specimen volume
5 g
Stability
Refrigerated: 24h, Frozen: 7d
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your doctor may order this test if you’ve had symptoms like diarrhea, stomach pain, fever, or other signs of infection—especially after eating contaminated food. It’s also used in certain investigations, such as unexplained gastrointestinal issues or when evaluating possible foodborne illness outbreaks.

What the Test Measures

The test detects two types of antibodies (IgM and IgG) against *Yersinia enterocolitica*. IgM antibodies appear early in infection and fade over time, while IgG antibodies persist longer, indicating past exposure.

How the Test Works

Blood is drawn to check for these antibodies using an immunoassay method. The presence of antibodies suggests exposure to the bacteria, but they don’t always confirm an active infection.

What the Results Mean

Positive results (for either IgM or IgG) indicate exposure to *Yersinia enterocolitica*, but symptoms may not have occurred recently. A high IgM level could suggest a recent infection, while IgG alone suggests past exposure. Always discuss results with your doctor.

Reference range

Adult: 10-40 U/LN/A

Specimen: stool

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Yersinia enterocolitica Antibodies

Frequently asked questions

What does a positive result mean?
A positive result means your body has detected antibodies against *Yersinia enterocolitica*, which may indicate past exposure or infection. This doesn’t always mean you were sick recently, but it can help guide further testing or treatment if symptoms persist.
Can this test diagnose an active infection?
No, this test alone cannot confirm an active infection. It only shows if your immune system has responded to the bacteria. If you suspect an infection, your doctor may recommend additional tests or monitoring.
How long do results take?
Results are typically available within 1 to 3 business days, depending on lab processing times. Your doctor will contact you with the final report.
  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 17, 2026. · Read our editorial policy