Bacteria and ulcers: a change in the research question

What changed

Reported curved bacteria in gastric biopsies and an association with active gastritis and peptic ulceration, challenging prevailing explanations of ulcer disease.

Scientific scope

Reported curved bacteria in gastric biopsies and an association with active gastritis and peptic ulceration, challenging prevailing explanations of ulcer disease. Scope limitation: The 100-patient observational paper suggests a causal role; it is not itself a randomized eradication trial or evidence that every ulcer has the same cause.

Evidence

Assessment uses the catalogue-linked source evidence for the stated contribution. The 100-patient observational paper suggests a causal role; it is not itself a randomized eradication trial or evidence that every ulcer has the same cause.

Contributors

• Barry J. Marshall · SCIENCE: Named source contributor; exact labor shares are not measured.
• J. Robin Warren · SCIENCE: Named source contributor; exact labor shares are not measured.

• UNIDENTIFIED CURVED BACILLI IN THE STOMACH OF PATIENTS WITH GASTRITIS AND PEPTIC ULCERATION
• Publisher-deposited byline: UNIDENTIFIED CURVED BACILLI IN THE STOMACH OF PATIENTS WITH GASTRITIS AND PEPTIC ULCERATION

Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.

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