A woman visits her doctor complaining of stomach pain and is diagnosed as having a stomach ulcer. if the doctor were to assess the microbial composition of the woman's stomach, what might he expect to find?
The doctor might find that she has the right bacteria that cause the ulcers (combined with stress most likely) as ones that can eat at the walls of the stomach and cause pain and discomfort and thus prescribe a special diet for her and some medicine to counteract the bacteria.
