[skunkworks]

We all have h. pylori in our stomachs, but only some of us have ulcers. This is because stress plays a role in weakening the stomach's defenses, giving h. pylori a chance to create ulcers.

[jgamman]

i believe the nobel prize committee begs to differ: http://nobelprize.org/nobel_prizes/medicine/laureates/2005/p...

[streptomycin]

> Helicobacter pylori is a spiral-shaped Gram-negative bacterium that colonizes the stomach in about 50% of all humans.