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Some useful guides
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Management of Helicobacter pylori infection—the Maastricht V/Florence Consensus Report
How long should I wait before doing follow up breath/stool test?

One of the first bugs to be sequenced, H.pylori has a small genome (1.6 MD) befitting its lifestyle in a hostile acidic mucosal niche. Of the 1500 genes, 750-1000 are essential, the others are different in each strain. Hp has an "open pan-Genome" which means the more strains you look at the more genes you will find - i.e. you will never have a complete set of all its possible genes!