All tests › Infection and immunity tests

Helicobacter pylori antibody

Infection and immunity tests · also printed as H. pylori IgG, H pylori antibody, Helicobacter pylori IgG, H. pylori serology, Helicobacter antibody

Typical UK adult rangeExpected result: Negative

Negative is the expected result.

What this test measures

The blood antibody test shows that the immune system has met Helicobacter pylori. It stays positive for years after the bacterium has gone, so it cannot show current infection.

Why doctors request it

Less used now that stool antigen and breath tests are available, but still printed on some panels.

What commonly pushes it up

Current or past H. pylori infection

What commonly pushes it down

A negative result is the usual finding

Everyday reasons for a value outside the range

Results can be equivocal and are then repeated
Recent vaccination or infection elsewhere can occasionally give a weak positive

About the sample

No fasting needed.

Written by a UK consultant physician. Typical UK adult reference ranges; your laboratory's own printed range takes precedence.

Got a report with Helicobacter pylori antibody on it?

Upload a photo or PDF and see every line against the range your lab printed, explained in plain English. First report free.

Read my report free

This is an educational summary of results you uploaded. It is not medical advice, a diagnosis or a treatment plan, and it does not replace the doctor who requested the test. If you are worried, or a result is marked outside range, discuss it with your doctor. Written and reviewed by a UK consultant physician. Reference ranges vary between laboratories.