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Campylobacter jejuni IgA Antibody (Serum)

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

This test measures your immune system’s response to *Campylobacter jejuni*, a common bacterial cause of gastrointestinal infections.

Quick summary

["Helps diagnose or monitor infections linked to *Campylobacter* (e.g., diarrhea, abdominal pain)."]

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

Key facts at a glance

LOINC
82845-9
Short code
C jejuni IgA+IgG+IgM Pnl Ser
Synonyms
C jejuni IgA+IgG+IgM Pnl Ser
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

The test detects antibodies of the IgA class produced by your immune system in response to *Campylobacter jejuni*. Antibodies are proteins your body makes to fight infections. This test is used to identify past or current exposure to the bacterium, which can cause foodborne illnesses.

Why It’s Ordered

Your healthcare provider may order this test if you’ve had symptoms like diarrhea, vomiting, or fever that could suggest a *Campylobacter* infection, especially after eating contaminated food. It may also be used in research or specialized diagnostic settings.

Sample Collection

A blood sample is drawn from a vein in your arm. The blood is processed into serum (the liquid part after clotting) for testing. This is a standard blood draw procedure and may cause a slight pinch or discomfort.

Test Preparation

No special preparation is needed. You may eat and drink normally before the test, but inform your provider if you’re taking certain medications that could affect blood results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IgA Antibody to *Campylobacter jejuni* (Serum)

Frequently asked questions

What does a positive result mean?
A positive result suggests you’ve been exposed to *Campylobacter jejuni* at some point, which may align with symptoms like diarrhea, fever, or abdominal pain. It does not confirm an active infection but may guide further testing or treatment if needed.
Can this test detect an active infection?
No, this test primarily detects past exposure via antibodies. For active infection, your provider may use other tests (e.g., stool cultures) or clinical judgment based on symptoms.
How long does it take to get results?
Results are typically available within 3–5 business days, depending on lab processing times. Your provider will discuss findings with you during follow-up.
  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