I used to research h. pylori infections. Please finish any antibiotic courses prescribed. Antibiotic-resistant h. pylori sucks and is much more difficult and expensive to treat.
I had h. Pylori. It can also give you stomach ulcers, which was quite painful.
Along with many healthy bacteria, no?
Yes, IANAD, but most antiobiotics that treat H. Pylori will also kill gram positive bacteria.