The Doctor Who Drank the Experiment

In 1980, medicine was completely certain about stomach ulcers. They were caused by stress, spicy food, alcohol and excess acid; they affected busy, ambitious people; and they could be managed but not cured. Patients took acid-reducing tablets for years — the two leading ulcer drugs were, at the time, the best-selling medicines on the planet — and when the tablets failed, surgeons removed parts of the stomach. Ulcers came back again and again, which surprised nobody: you cannot cure a personality, and stress, everyone agreed, was the real disease.

One thing was considered so obvious that it was barely worth teaching: the stomach is sterile. Its acid is strong enough to dissolve metal; no bacteria could possibly live there. When pathologists occasionally noticed spiral-shaped bacteria in stomach samples, they were assumed to be contamination — mistakes made in the laboratory, not residents of the stomach.

Then, in Perth, Australia — about as far from the centres of medical power as it is possible to be — a quiet pathologist named Robin Warren kept seeing the same thing. In biopsy after biopsy, the spiral bacteria appeared, and they appeared exactly where the stomach lining was inflamed. In 1981 he was joined by Barry Marshall, a young trainee doctor looking for a research project. Marshall checked the records and found the pattern held: the bacteria were present in almost every patient with ulcers. The two began to ask a question that sounded, to their colleagues, almost stupid: what if ulcers are an infection?

To prove the hypothesis, they first had to grow the bacteria in the laboratory — and for months they failed. Sample after sample was cultured and thrown away after two days, the standard period, showing nothing. Then came the Easter holiday of 1982. The laboratory was busy, the staff went home, and one set of plates was forgotten and left for five days instead of two. When the technicians returned, the plates were covered in colonies. The bacteria were simply slow growers; the rulebook, not the hypothesis, had been the problem. The organism was eventually named Helicobacter pylori.

What followed was not applause. When their findings were submitted to a national gastroenterology meeting in 1983, the abstract was rejected — the reviewers rated it among the worst submitted that year. Senior specialists dismissed the idea in public; some laughed. And the sceptics had reasonable arguments: correlation is not cause — perhaps the bacteria simply liked living in damaged stomachs rather than causing the damage; animal experiments had failed, because the bacteria would not infect pigs or rats; and the claim was, everyone noted, extremely convenient for an ambitious young doctor with a career to build. Meanwhile — a fact nobody needed to say aloud — the world's pharmaceutical industry was earning billions per year from tablets that treated ulcers forever without curing them. A cheap cure with antibiotics was, commercially speaking, nobody's dream.

Marshall could not infect an animal. He could not experiment on patients. In July 1984, frustrated and certain, he did the thing that made this story immortal: he mixed a culture of the bacteria into a broth and drank it himself. He told almost nobody — his wife found out only afterwards, and was furious. He expected, perhaps, an ulcer in a year or two. Instead, within days he was vomiting, exhausted, and — as biopsies of his own stomach confirmed — suffering from severe gastritis, his previously healthy stomach now full of the spiral bacteria. The sterile stomach had been colonised, on schedule, by the organism that could not live there. He took antibiotics and recovered.

Even self-poisoning did not settle it quickly. One dramatic case is an anecdote, not a trial — and on this, the sceptics were simply right. What settled it was a decade of ordinary, unglamorous science: controlled trials in several countries showing that patients treated with antibiotics were cured — not managed, cured — and that their ulcers did not return. In 1994, an American national conference formally concluded that ulcers were an infectious disease and should be treated with antibiotics. The same year, the bacterium was classified as a cause of stomach cancer — the first bacterium ever put in that category. In 2005, Warren and Marshall received the Nobel Prize in Medicine. The citation praised their "tenacity and a prepared mind" — a polite way of saying: they were told no for ten years and kept going.

The impact is easy to state and hard to absorb. A disease that had tortured millions of people for centuries — blamed on their personalities, treated with lifelong tablets and mutilating surgery — turned out to be curable in about two weeks with cheap antibiotics. Ulcer surgery has almost disappeared from rich countries. And a whole class of blockbuster drugs lost its best market: the tablets that had been a subscription for life became, for ulcer patients, unnecessary. Medicine's most profitable chronic condition had been quietly abolished by two men from Perth and a forgotten laboratory plate.

The story's edge — the reason it is still argued about at dinner tables and in ethics seminars — is that every actor behaved almost reasonably. The professors defended a century of consistent evidence against a wild idea from nowhere. The journals applied their normal standards. The companies sold what doctors prescribed. And yet the system, working normally, delayed a cure for years while patients suffered and some died — of a disease that a course of antibiotics could end. The question the story leaves is uncomfortably practical: how many other "personalities", "lifestyles" and "chronic conditions" are sitting in today's textbooks, waiting for someone stubborn enough to drink the experiment?