A stomach biopsy may not detect an H. pylori infection that is present if the biopsy samples are taken from
areas that are not infected by the H. pylori
Rough handling, contamination, or inadequate
refrigeration of the blood sample can cause inaccurate blood antibody test
When a blood antibody test is done early in an
H. pylori infection, the results may be
falsely negative because the level of antibodies is
too low to measure.
The likelihood of infection with
H. pylori increases with age. Older adults are more
likely to have detectable amounts of the bacteria in their body.
What To Think About
urea breath test for H. pylori
is not usually done during pregnancy or while you are breast-feeding, because
the radiation could harm your child.
The stool antigen test
is the least expensive of the four tests for Helicobacter pylori, but it may not be as accurate as the
other tests. The stomach biopsy is very accurate, but it is the most expensive
and most risky of the four tests.
A negative stool antigen test
does not always mean that an H. pylori infection is not
Although many people are infected with H. pylori bacteria, only a few of them will develop peptic ulcer disease.
For this reason, other factors (such as a person's symptoms) should be
considered when interpreting the results of an H. pylori
Blood tests for H. pylori may be
positive for several years after the infection, so the urea breath test, the stool antigen test,
or a biopsy may be used to determine if treatment has been