Helicobacter connections.
Level 5 - mechanism / opinion, no new human data
Historical lecture and narrative review without original clinical trial data.
PubMed 16902931 · doi:10.1002/cmdc.200600153
What was done
This historical lecture reviews the discovery of *Helicobacter pylori* by Marshall and Warren, detailing early isolation efforts from 1981, patient culturing series, Marshall's self-inoculation experiment, and the development of diagnostic tests and treatments.
What was found
In an early study series, 100% of 13 patients with duodenal ulcers were infected with *H. pylori*. Marshall ingested a culture of the bacterium to demonstrate it causes gastritis in a healthy individual. These observations contributed to the consensus established by 1994 that *H. pylori* causes most gastroduodenal diseases, including peptic ulcer and gastric cancer.
Why it matters
It chronicles the paradigm shift that transformed peptic ulcer disease from a surgical condition to a treatable bacterial infection.
Limits
This is a retrospective historical narrative and lecture, not an empirical research report or systematic review. The referenced findings are based on historical anecdotes, including a single-subject self-experiment and an uncontrolled series of 13 patients.
Cited by
- supports Peptic ulcers are caused by a bacterial infection (Helicobacter pylori) rather than stress, a discovery that was awarded the Nobel Prize.