Helicobacter pylori (H. pylori) Tests Test
An H. pylori test checks for a common stomach bacteria that can cause ulcers and other digestive problems.
What this test measures
Helicobacter pylori (H. pylori) is a type of bacteria that infects the lining of the stomach and the first part of the small intestine. The test detects whether you have an active H. pylori infection.
What your results mean
Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.
Higher-than-normal results
A positive test result means you have an H. pylori infection. Your provider will usually prescribe antibiotics and other medicines to treat the infection and help heal your stomach.
Lower-than-normal results
A negative (normal) test result means you probably don't have an H. pylori infection. Your provider may order more tests to find out the cause of your symptoms.
Frequently asked questions
What is H. pylori?
H. pylori is a common type of bacteria that infects the lining of the stomach and the first part of the small intestine.
How do you get H. pylori?
Researchers aren't sure. It may spread through contact with vomit, stool, or saliva from an infected person, or through contaminated food and water.
What symptoms does H. pylori cause?
Most people have no symptoms. But in some, it can cause peptic ulcers, gastritis, and ongoing indigestion.
How is H. pylori tested?
Common tests use samples of your breath or stool. In some cases, a tissue sample from your stomach is tested.
What happens if the test is positive?
Your provider will usually prescribe one or more antibiotics to treat the infection, along with other medicines to relieve symptoms and help heal your stomach.
Related lab tests
Sources
- MedlinePlus: Helicobacter pylori (H. pylori) Tests — NIH MedlinePlus
Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.