This is one of those issues where the supposed quacks were ahead of the AMA. The same relationship between microbe and host exists, was identified, and treated with antibiotics, with the domestic pig. That's one thing that helped crack the case for human ulcers.
Here's yesterday's URL, after Googling the title:
http://www.nytimes.com/2005/10/03/science/04cnd-nobel.html?hp&ex=1128398400&en=2631f547ccc36dea&ei=5094&partner=homepage
Here's today's elaboration of the same story by the same author, who happens to use the M.D. suffix as he pleases. Two Win Nobel Prize for Discovering Bacterium Tied to Stomach Ailments
Today's URL:
http://www.nytimes.com/2005/10/04/science/04nobe.html?pagewanted=1
What I find odd is that when you enter the author's name into the NY Times' own search engine, you don't find yesterday's story. Here's their search URL:
http://query.nytimes.com/search/query?query=LAWRENCE%20K%2e%20ALTMAN&date_select=full&srchst=nyt
Go figure.