Testing and Eradication of H. pylori in First-Degree Relatives

Indications for Testing and Eradication

First-degree relatives of patients with gastric cancer should be tested and treated for H. pylori, as they have a 2-3 times increased risk of developing gastric cancer, according to the European Society of Gastrointestinal Endoscopy 1, 2
The risk of gastric cancer increases dramatically (10-fold) when multiple first-degree relatives have gastric cancer, as recommended by the European Society of Gastrointestinal Endoscopy 1, 2
Testing and eradication of H. pylori in first-degree relatives of patients with gastric cancer represents a Grade A recommendation with level 1a-4 evidence, as stated by the European Society of Gastrointestinal Endoscopy 1, 2

Family history of gastric cancer is the most critical factor in assessing the risk of H. pylori transmission, as recommended by the European Society of Gastrointestinal Endoscopy 1, 2
Geographic origin from high gastric cancer incidence regions is also a significant risk factor, according to the European Society of Gastrointestinal Endoscopy 1, 2
Age of relatives (gastric cancer risk increases significantly after age 45) and presence of alarm symptoms in relatives (weight loss, dysphagia, anemia) are also important risk factors, as stated by the European Society of Gastrointestinal Endoscopy 3

Previous gastric neoplasia (MALT lymphoma, adenoma, or cancer) is an indication for testing and treating relatives for H. pylori, as recommended by the European Society of Gastrointestinal Endoscopy 1
Severe pan-gastritis or corpus-predominant gastritis, chronic gastric acid inhibition therapy planned for >1 year, and strong environmental risk factors (heavy smoking, occupational dust exposure) are also indications for testing and treating relatives for H. pylori, according to the European Society of Gastrointestinal Endoscopy 1

H. pylori is moderately contagious within families, with first-degree relatives having a 2-3 times increased risk of infection, and this risk increases 10-fold when multiple family members are affected 4, 5, 6, 7

When H. pylori infection recurs after initially successful eradication, ongoing intrafamilial exposure should be suspected, and testing and treating household members who test positive is recommended to prevent reinfection cycles 8
First-degree relatives of patients with gastric cancer warrant particular attention, as they should be considered for H. pylori eradication even without symptoms due to their substantially elevated cancer risk 4, 5, 6, 7
The American Gastroenterological Association recommends considering testing other household members, especially if the index patient experiences recurrent infection after treatment, and prioritizing testing first-degree relatives of anyone with gastric cancer diagnosis 8, 4, 5, 6, 7
Concurrent treatment of all positive household members is recommended to break the transmission cycle 8

The 2022 Taipei Global Consensus strongly recommends testing family members residing in the same household of patients with proven active H. pylori infections, with a moderate evidence level and 91% agreement 9
Person-to-person transmission occurs within families, making household members at significantly increased risk, according to the American College of Gastroenterology 10, 9

Testing and treating all infected household members protects family members from developing H. pylori-related diseases, including peptic ulcer and gastric cancer, with a 17% lifetime risk among infected individuals 10, 11
Testing and treating infected family members can break the transmission cycle and prevent reinfection of the index patient, as recommended by the American Gastroenterological Association 10, 9

The American College of Gastroenterology recommends using noninvasive testing methods, such as urea breath test (UBT) or stool antigen test, for family screening 10
Patients should be off antibiotics, bismuth, or proton pump inhibitors for at least 2 weeks before testing to avoid false negatives, according to the American College of Gastroenterology 10