NCT07340593

Helicobacter Pylori Infection and Gastric Diseases in Lao PDR: First Community-Wide Population-Based Study

A Community-based Collaborative Study for Eradication of Helicobacter Pylori and Associated Gastric Cancer in Luangprabang and Champasak Province, in Lao PDR 2025.

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 1,251 (actual)
• Sponsor: Zero Helicobacter IGAN Network · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

This study aims to determine the regional prevalence of Helicobacter pylori infection, bacterial strain differences, and the prevalence of gastric cancer in two provinces of Laos, a multi-ethnic country where these factors may vary by region and ethnicity. The study also evaluates whether H. pylori eradication therapy contributes to disease prevention. Residents aged 18 years or older in Luang Prabang Province and Champasak Province underwent stool antigen testing, and H. pylori-positive individuals received eradication therapy. High-risk participants aged ≥40 years underwent upper gastrointestinal endoscopy for early detection of gastric cancer.

Detailed description

This population-based study was conducted in Laos to investigate geographic variation in Helicobacter pylori infection, bacterial strains, and the prevalence of precancerous and cancerous gastric lesions. Laos is a multi-ethnic nation, and differences in H. pylori prevalence and strain distribution are expected across ethnic groups and regions. The goal of this study is to assess the current burden of infection and evaluate the effectiveness of eradication therapy as a preventive strategy for gastric cancer. Eligible participants were residents aged ≥18 years living in Luang Prabang Province (North) and Champasak Province (South). The study received approval from the Ethics Committee of the Ministry of Health of Laos. All participants received an explanation of the risks and benefits of screening and provided written informed consent. The study procedures were conducted as follows: 1. Stool H. pylori antigen rapid test was performed for all enrolled participants. 2. Participants aged ≥40 years who tested positive were considered a high-risk group and underwent upper gastrointestinal endoscopy for early detection of precancerous gastric lesions and gastric cancer. 3. All H. pylori-positive participants received 14-day triple therapy consisting of lansoprazole, amoxicillin, and clarithromycin. 4. Eradication was assessed using a follow-up stool antigen test at 8 months after treatment in Luang Prabang Province and 6 months after treatment in Champasak Province. Screening in Luang Prabang Province was conducted between December 2023 and October 2024, and screening in Champasak Province between October 2024 and June 2024.

Conditions

• Gastric Cancer Screening
• Prevention and Control
• Helicobacter Eradication
• Helicobacter Infections

Timeline

• Start date: 2023-12-18
• Primary completion: 2024-10-10
• Completion: 2025-06-07
• First posted: 2026-01-14
• Last updated: 2026-01-14

Locations

1 site across 1 country: Laos