It's still something of a mystery how I became infected. I eat a very good diet. Take care of myself. I'm retired so no stress.
Stress does not cause ulcers, it only aggravates the damage that h. pylorii are doing.
If I get a cold and have to have amoxicillin or augmentin (which has amoxicillin in it) I always add bismuth tablets to my ingestion at that time. I have never had this infection.
No one seems to have the vector for transmission of h. pylori, at least not published so far. Maybe this is a touchy issue. But I would say at least by direct transmission from saliva (kissing) or from incompletely cleansed raw vegetables or lettuce (the filthy stuff).
But for dang sure, I NEVER let a dog lick my face, or "kiss" one, like some dog-loving boobs do. Their innards have got to be filthy. You don't have a dog, do you? or some other animal. Cats lick themselves all over, and I am allergic to their flaky proteins from dried saliva shed from their licked fur.
H. pylori seem to be more prevalent in the cultures that are not too clean, i. e. the Iceman.
I never eat raw meat or raw fish, like the Nipponese do.
Just thinking about this gags me.