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Helicobacter pylori IgA Antibody, Serum (Screening)

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

This test checks for antibodies to *Helicobacter pylori*, a bacteria often linked to stomach issues like ulcers or inflammation. It helps determine if your body has ever been exposed to this bacterium.

Quick summary

["This test screens for past or possible *H. pylori* infection via your blood serum."]

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

Key facts at a glance

LOINC
109971-2
Short code
H pylori IgA Msmt Ser
Synonyms
H pylori IgA Msmt 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

Why This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms like stomach pain, nausea, or unexplained weight loss. It’s also used to evaluate risk for stomach ulcers or other stomach-related conditions linked to *H. pylori*.

What to Expect Before the Test

No special preparation is needed. A blood sample will be taken from a vein in your arm, similar to other blood tests. You may feel a slight pinch, but it’s usually over quickly.

What the Test Results Mean

Positive results suggest your body has produced antibodies to *H. pylori*, indicating past or current infection. Negative results mean no detectable antibodies were found. Results alone don’t confirm infection—your doctor may order additional tests (like a breath test or stool sample).

Common Conditions Linked to This Test

Positive results may raise concerns for conditions like chronic gastritis, stomach ulcers, or increased risk of stomach cancer. However, this test alone doesn’t diagnose these conditions—it’s part of a broader evaluation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: *H. pylori* Infection and Health

Short name

IgA Antibody to *H. pylori* (Serum)

Frequently asked questions

What does a positive result mean for my health?
A positive result indicates your body has likely been exposed to *H. pylori*, but it doesn’t confirm active infection or disease. Your doctor will discuss next steps, such as further testing or treatment options if needed.
Can this test detect active infection?
No, this test only detects antibodies, which appear after your body has been exposed to the bacteria. For active infection, tests like a breath test (urea test) or stool antigen test are typically used.
How long does it take to get results?
Results are usually available within 1–3 business days, depending on your lab. 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 16, 2026. · Read our editorial policy