H. pylori Infection Diagnosis and Management

Patient Evaluation and Risk Factors

Patients over 45 years with dyspeptic symptoms should be referred for endoscopy due to increased risk of gastric cancer, with a standardized incidence rate of gastric cancer in Europeans over 45 being 19 per 100,000 for men and 9 per 100,000 for women 1
Patients under 45 years without alarm symptoms can be tested and treated for H. pylori without endoscopy, using urea breath test or laboratory serology, as recommended by the European Helicobacter Study Group 1, 2
Certain symptoms warrant immediate referral to a specialist for endoscopy, regardless of age, including weight loss, progressive dysphagia, recurrent vomiting, evidence of gastrointestinal bleeding, anemia, palpable mass, and malabsorption, as recommended by the American Gastroenterological Association 1

For patients ≥45 years or those with alarm symptoms, refer for endoscopy, test for H. pylori during endoscopy, and treat based on findings, with histology having 90-95% sensitivity and 95-98% specificity for detecting H. pylori 1, 3, 4
Urea breath test or laboratory serology can be used to test for H. pylori in patients under 45 years without alarm symptoms 1, 2

H. pylori eradication requires specific antibiotic regimens with proven efficacy, and self-medication with alternative treatments could delay proper treatment and increase risk of complications, as recommended by the European Helicobacter Study Group and the American College of Gastroenterology 2
After successful H. pylori eradication, some patients may continue to have residual symptoms that require targeted treatment, such as PPI therapy for persistent epigastric pain, and prokinetic agents for persistent fullness/bloating 5

H. pylori infection significantly increases the risk of both gastric and duodenal ulcers, as stated by the American College of Gastroenterology 2
Strong evidence links H. pylori to iron-deficiency anemia (Evidence level 1a), idiopathic thrombocytopenic purpura (Evidence level 1b), and vitamin B12 deficiency (Evidence level 3b), according to the American Society of Hematology 2
H. pylori infection is the most consistent and important risk factor for gastric cancer, and its eradication is the most promising strategy to reduce gastric cancer incidence, with H. pylori infection present in 71-95% of all gastric cancers 2
Other risk factors for gastric cancer include high salt intake, preserved foods, low consumption of fresh fruits and vegetables, smoking, heavy alcohol consumption, occupational exposure to dust, coal, quartz, cement, and quarry work, and long-term acid suppression 6, 7, 2

Early eradication of H. pylori is most effective before development of preneoplastic conditions, with target populations for screening and eradication including first-degree relatives of gastric cancer patients, patients with previous gastric neoplasia, patients with atrophic gastritis or intestinal metaplasia, individuals from high-risk regions, and non-white racial and ethnic groups in the US 2, 8
Endoscopic screening is recommended for early detection, with risk stratification based on severity and distribution of preneoplastic lesions, family history, and ethnic background, and OLGA/OLGIM staging systems can be used to assess gastritis progression and cancer risk 2, 8
Increase consumption of fresh fruits and vegetables, foods rich in antioxidants, and whole grains, and reduce consumption of salt, processed meats, and high-fat foods to reduce risk, as recommended by the American Gastroenterological Association and the National Institute of Diabetes and Digestive and Kidney Diseases 7, 2
Smoking cessation and moderate alcohol consumption are also recommended, and patients should be advised to separate alternative treatments from medication intake by at least 2 hours to minimize potential interference with medication absorption 6, 7, 2