Also known as: Helicobacter pylori Infection
H. pylori is a bacterial infection of the stomach lining that affects roughly half the world's population. It is a major cause of gastritis, peptic ulcers, and is a risk factor for stomach cancer.
Helicobacter pylori infects approximately 50% of the global population, with prevalence rates exceeding 70% in developing countries. Most infections are acquired in childhood and persist for life if untreated.
The bacterium survives in the acidic stomach environment by producing urease, which neutralizes gastric acid in its immediate vicinity. Chronic H. pylori infection causes persistent inflammation (gastritis) that may progress to peptic ulcer disease in approximately 10-15% of infected individuals.
H. pylori is classified as a Group 1 carcinogen by the World Health Organization due to its role in gastric adenocarcinoma and MALT lymphoma. The lifetime risk of gastric cancer in infected individuals is approximately 1-3%, influenced by bacterial strain, host genetics, and environmental factors.
Eradication of H. pylori cures most peptic ulcers and dramatically reduces recurrence rates from approximately 60-80% per year to less than 5%. Standard treatment involves combination therapy with a proton pump inhibitor and two or three antibiotics.
People with H. pylori Infection often experience the following symptoms.
A burning or gnawing pain in the upper abdomen, often occurring when the stomach is empty and improving with food or antacids. This is the most common symptom of H. pylori-related gastritis.
Persistent nausea, early satiety, and reduced appetite. Some patients experience unintentional weight loss over time.
Excessive gas, bloating, and frequent burping related to altered gastric motility and acid production from chronic mucosal inflammation.
When ulcers develop, symptoms may include intense epigastric pain, hematemesis (vomiting blood), or melena (dark, tarry stools) from gastrointestinal bleeding.
Certain factors may increase your likelihood of developing H. pylori Infection.
Common approaches to managing h. pylori infection. Always consult a healthcare provider for personalized treatment.
Standard first-line treatment combining a proton pump inhibitor (PPI) with two antibiotics (typically clarithromycin plus amoxicillin or metronidazole) for 14 days.
PPI, bismuth subsalicylate, metronidazole, and tetracycline for 14 days. Recommended as first-line in areas with high clarithromycin resistance or as second-line after failed triple therapy.
Testing to confirm successful eradication at least 4 weeks after completing antibiotics and 2 weeks after stopping PPIs, using urea breath test or stool antigen test.
Some evidence suggests that probiotics taken alongside antibiotic therapy may improve eradication rates and reduce antibiotic side effects, though evidence is still evolving.
Non-invasive testing includes urea breath test (gold standard for active infection), stool antigen test, and serology (indicates exposure but not necessarily active infection). Invasive testing via endoscopy allows biopsy for rapid urease test, histology, and culture with antibiotic sensitivity.
See a doctor if you have persistent stomach pain, especially if it worsens when your stomach is empty, or if you experience unintentional weight loss, bloody or dark stools, or persistent vomiting.
Steps that may help reduce the risk of developing or worsening h. pylori infection.
Good hand hygiene and sanitation
Safe drinking water
Proper food handling and preparation
Test and treat household contacts when appropriate
If left untreated or poorly managed, h. pylori infection may lead to:
Not necessarily. Treatment is recommended for those with peptic ulcers, MALT lymphoma, unexplained iron deficiency anemia, or long-term NSAID use. Testing and treatment may also be considered for dyspeptic patients.
Reinfection is possible but relatively uncommon in developed countries (less than 2% per year). In developing countries, reinfection rates may be higher due to ongoing exposure.
The exact transmission route is not fully established but is thought to be oral-oral or fecal-oral, often within families during childhood. Contaminated water may also play a role.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.