There are several types of tests for H.pylori. They are usually classed as invasive (you need to have a 'scope put down) and non-invasive (it's just a blood sample or a breath sample). Tests can also be indirect (meaning they don't actually test for the germ itself, maybe just antibodies in the blood), or direct (these tests test for some activity caused by the bug itself so can be more accurate e.g. breath tests). "Direct" tests are said to test for "ACTIVE" infection which will require antibiotic treatment. Indirect tests can detect signs of a past or "INACTIVE" infection, in which case no treatment is required.
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