Yes: The best tests for h pylori infection are the breath and the fecal testing. These are able to distinguish between active and past infections which the blood antibody testing is not.
Answered 8/21/2012
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Yes: "the sensitivity and specificity in untreated subjects are very high and range from 90 to 98% and from 92 to 100%, respectively" http://gut.bmj.com/content/45/suppl_1/I18.full but it sounds like it isn't a simple test kit.
Answered 8/20/2014
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