Archive · 4 Oct 2026
Barry Marshall Says Early H. pylori Treatment May Help Prevent Gastric Cancer
H. pylori is a kind of germ that can live in the stomach.
If it stays there for a long time, it can cause ongoing irritation and raise the chance of stomach cancer.
Barry Marshall says finding and treating the germ early may help prevent some cancers.
Doctors should check afterward to make sure the germ is gone.
Some antibiotics are becoming less effective because the germ can resist them.
So doctors may need to choose medicines based on what works in their area.
Marshall spoke about these issues at a medical meeting in India.
He also said tests should be easy for people to get.
Nobel laureate Barry Marshall said early detection and eradication of H. pylori could help prevent some gastric cancers.
He urged wider testing, effective treatment, and follow-up tests to confirm the bacterium has been cleared.
Marshall warned that antibiotic resistance and repeated antibiotic exposure complicate treatment, requiring attention to local resistance patterns.
International Agency for Research on Cancer guidance supports screen-and-treat programmes where expected benefits outweigh potential harms, alongside antibiotic stewardship.
At the World Congress of Gastroenterology in India, Marshall highlighted the need for research into local strains and accessible testing.
- Who
- Nobel laureate and gastroenterologist Dr Barry Marshall.
- What
- He said early detection and eradication of H. pylori could help prevent gastric cancer and called for testing, appropriate treatment, and confirmation of eradication.
- When
- During the World Congress of Gastroenterology 2026, which concluded on October 3.
- Where
- New Delhi, India.
- Why
- Persistent H. pylori infection can cause chronic stomach inflammation and increase gastric cancer risk; antibiotic resistance makes effective, locally tailored treatment important.
Case for screening and treatment
Challenges and cautions
Population screening
Case for screening and treatment
Finding and treating H. pylori before extensive stomach damage may prevent the chain of events that can lead to cancer; IARC supports programmes where benefits outweigh harms.
Challenges and cautions
The article notes concerns about repeated antibiotic exposure and says screening should be paired with stewardship and appropriate follow-up.
Antibiotic treatment
Case for screening and treatment
Eradication therapy can address an infection associated with chronic inflammation and gastric cancer risk.
Challenges and cautions
Rising resistance can make established regimens less successful, so treatment should reflect local resistance patterns rather than rely on the same antibiotics everywhere.
- Bacterium discussed
- Helicobacter pylori (H. pylori)
- Potential health effect
- Persistent infection can cause chronic stomach inflammation and increase gastric cancer risk.
- Recommended approach
- Identify infected people, provide effective eradication therapy, and confirm clearance with follow-up testing.
- Treatment challenge
- Antimicrobial resistance threatens established treatment regimens; repeated antibiotic exposure may also affect the microbiome.
- IARC guidance
- Screen-and-treat programmes are recommended in populations where expected benefits outweigh potential harms.
- Congress attendance
- Around 3,000 delegates from 61 countries attended the four-day World Congress of Gastroenterology.
- PYtest
- Marshall's C14 urea breath test is described as a non-invasive, quantitative test that takes 15 minutes.